The central eyes occupy an area slightly broader than long, and scarcely perceptibly broader behind than in front; the lateral eyes of the anterior row are at least half again as large as the fore centrals, the eyes of this row being at equal distances from each other; the eyes of the hind row are of equal size, the lateral ones being somewhat more distant from the centrals than these from one another. The sternum is about as broad as long, nearly heart-shaped, truncate in front. The mandibles are small and perpendicular, their length is not half again as great as the height of the clypeus. The palpi are very short; their patellar joint is as long as broad and of equal breadth when seen from above, gradually incrassated toward the apex when seen from the side; the tibial joint is shorter than the patellar, seen from above transverse and somewhat oblique, the outer side being longer than the inner; the apex of the outer side is drawn out into a rather strong forward-directed process, which is about as long as the joint itself, straight, and tapering toward the pointed apex. The tarsal joint, or lamina bulbi, is longer than the two preceding joints together, much broader than they, convex longitudinally, nearly ovate; the bulbus is surrounded by a very long and fine black spine, the extremity of which forms a circular coil on the outer side of the bulb, toward its apex. The legs are long and slender, armed with fine spines. The abdomen is much longer than broad, ovate; as well the cephalothorax as the abdomen is, in the only quite barerubbed example that I have seen, very thinly scattered with small elevated tubercles, which probably have borne each a bristle or hair; the legs of the first and fourth pairs are wanting in this example and nearly all the spines rubbed off. Color.-Cephalothorax brownish testaceous, thinly strewed with small dark points, and provided with two brown longitudinal bands toward the sides, each ending with a black spot behind; the extreme margin is black, the pale space between the margin and the lateral bands rather narrower than the bands, the pale middle space broader, gradually narrowing backward, with the large lateral eye-tubercles whitish. Sternum and parts of the mouth testaceous, the mandibles, however, grayish testaceous, whitish at the apex, and there marked with a small, brownish-red, transverse line; the palpi are pale testaceous, with the tarsal joint grayishwhite; the extreme apex of the process of the tibial joint is black, as is also the long spine of the bulb. The legs are dusky yellow or testaceous, the thighs thickly sprinkled with small brownish-red spots and points; in the anterior legs, at least those of the second pair, the thighs have a narrow, the tibiæ a broader, brownish-red ring at the apex, the metatarsi and tarsi have their apical half reddish-brown, the extreme apex, however, of the tarsi being pale. The posterior legs, at least those of the third pair, are without rings. The back of the abdomen is, on its anterior half, pale grayish-brown, thinly strewed with some small blackish points; it is surrounded by a paler whitish band, and on its posterior half are two rather broad longitudinal reddish-brown bands reaching from the middle of the back to the anus, converging backward, and coarsely den tated in their outer margin; the space between these bands is whitish. On each side of the abdomen, at its fore extremity, just beneath the whitish band which surrounds the back, is a short, longitudinal reddishbrown line; the sides have, moreover, behind and more downward, row of small, irregular, reddish-brown spots. The under part of the abdomen is whitish-gray, with two brownish-red points at the rima geni. talis. The mamilla are whitish-gray, the inferior pair with a brownishred spot at the base. Length of body 23, length and breadth of cephalothorax 1 millim.; length of abdomen 12, breadth of same somewhat more than 1 millim. Length of legs II 7, of legs III 3 millim; pat. + tibia II a little more than 23, pat. + tibia IV 1 miliim. The collection includes a single very damaged male specimen of this fine little spider, captured at American Fork Cañon, Utah, July 22. The female differs probably much both in form and color from the male. 16. M. vatia (Clerck). Gen. MISUMENA (Latr.), 1804. SYN.-1757.-Araneus vatius Clerck, Svenska Spindl., p. 128, pl. 6, tab. 5. 1778.-Aranea citrea De Geer, Mém., vii, p. 293, pl. 18, figs. 17-22 1848.- Thomisus fartus Hentz, Descr. and Fig. of the Aran. of the U. S., c, v, p. 445, pl. xxiii, fig. 4. 1872.-Misumena vatia Thor., Rem. on Syr., 3, p. 258. Of this widely spread species, the collection contains three female examples, captured at Lawrence, Kans., Boulder, Colo., and Golden, Colo., ("Foot-hills entrance in Clear Creek Cañon "), June 25 to July 13. Thom. aleatorius Hentz (I. c., p. 444, pl. xxiii, fig. 2) is perhaps the male of this species, and Th. celer id. (l. c., p. 446, pl. xxiii, fig. 5) a variety of the female. Subfam. PHILODROMINI. Gen. PHILODROMUS (Walck.), 1820–26. 17. Ph. aureolus Clerck. SYN.-1757.-Araneus aureolus Clerck, Svenska Spindl., p. 133, pl. 6, tab. 9. 1872.-Philodromus aureolus Thor., Rem. on Syn., 3, p. 264. A male of this in Europe common species was captured at the Great Salt Lake, Utah, July 27, and a female at Manitou, Colo., July 16; both examples are full-grown. 18. Ph. virescens n. Pale whitish or yellowish-green, the cephalothorax brownish or violet on the sides; joints of legs slightly violet at the apex; abdomen with a pale violet band along each side, and two short parallel violet lines above the anus; second pair of legs the longest, third and fourth pairs of very nearly the same length; eyes of the front row of the same size, hind lateral eyes slightly larger than hiud centrals; area of the central eyes much broader behind, shorter than broad behind; interval between the central eyes greater than that between them and the laterals of the same row; abdomen nearly half again as long as broad; vulva consisting of a pale brownish depression, bordered on the sides by two nearly parallel strong blackish costæ.- ad. Length about 6 millim. Female.-Cephalothorax as long as the tibia of the second pair, shorter than patella + tibia of the fourth pair, a little broader than long, strongly rounded in the sides, also rounded in front, with the clypeus nearly half as broad as the pars thoracica; seen in profile, the cephalothorax is of moderate height, with the posterior declivity rather steep and short, the back then straight to the hind central eyes, the forehead between the central ey es sloping; also the clypeus is sloping, and its height a little greater than the length of the area occupied by the central eyes. Sternum broad, truncate in front. Eyes small, of nearly equal size, both the rows curved moderately upward, the front row being a little more strongly curved than the hind row. The lateral eyes of the front row are scarcely, those of the hind row a little, larger than the central eyes of the same row; the area occupied by the central eyes is about half a gain as broad behind as in front, its length being smaller than its breadth behind and a little greater than its breadth in front. The interval between the hind lateral and central eyes is smaller than that between these latter, the interval between the fore lateral and central eyes, which is not much greater than the diameter of an eye, is nearly double as small as that between the fore centrals, and also smaller than the interval between the fore lateral and the hind central eyes. The length of the mandibles is scarcely more than half again as great as the height of the clypeus, and their thickness at the base is about that of the fore tibiæ. The palpi are short and armed with several spines. The legs are of the usual form; the second pair, which is the longest, is five times as long as cephalothorax, the third pair is very nearly as long as the fourth; all the thighs, tibiæ, and metatarsi are armed with several long spines, and even the patella have one or two spines; the spines on the under part of the tibiæ are 2. 2. 2. The abdomen is nearly half again as long as broad, broadest between the middle and the apex, inversely pentagono-ovate. The vulva consists of a rather small but very conspicuous depression a little longer than broad, and limited on the sides by two parallel strong costæ, curved a little inward at the apices. The whole body is rather densely covered with fine appressed hair. Color.-Cephalothorax pale greenish along the middle, brownish-violet on the sides; these side-bands nearly as broad as the pale greenish middle band, which shows a lèss distinct, coarse, whitish V on the pars cephalica, behind. Sternum and parts of the mouth pale greenish or yellowish. Palpi and legs pale greenish, the thighs, patellæ, tibiæ, and metatarsi slightly violet at the extreme apex. The abdomen is of a pale whitish or yellowish-green color, paler beneath; it has two short, longitudinal, nearly parallel, unequal, violet lines immediately above the anus, and a less distinct, pale, unequal, violet band along each side. The vulva is placed in a pale brown spot, and is itself pale brown, with the lateral costæ blackish. The mamille are pale greenish-yellow; the upper pair violet above. The fine hair with which the body and extremities are covered is whitish; the thighs are sprinkled with black hairs; the spines are black. Length of body 6, of cephalothorax 2 millim.; breadth of cephalothorax 2 millim.; length of abdomen 4, breadth of same 3 millim. Length of legs: I 8, II 10, III nearly 7, IV 7 millim.; pat. + tibia I 3, II 31, IV 23 millim... The only example in the collection, a female, was captured at Golden, Colo., July 3. 19. Ph. inquisitor n. Cephalothorax dark brown, with a lougitudinal short and rather narrow, pale middle band behind; the eye-rows very slightly curved, the lateral eyes of each row little, if at all, larger than the centrals of the row; area of the central eyes slightly broader than long, broader behind than in front; interval between the lateral and the central eyes of the same row much smaller than that between the centrals; legs dark brown, with pale irregular rings; back of abdomen pale grayish-white in front, with a lanceolate black band along the middle of this grayishwhite area, which is continued backward as a tapering grayish-white band, on the sides of which the back is dark brown, mottled with black and white; vulva consisting of a small, semicircular, pale brown depression, with two short, longitudinal, parallel, black costa behind.-9 ad. Length about 6 millim. Female.-Cephalothorax little longer than broad, as long as tibia of the fourth pair, very strongly rounded in the sides, strongly sinuated and narrowed just in front of the coxæ of the first pair, rather thickly cov ered with coarse appressed hair; the pars cephalica narrowing forward, slightly rounded in front, the breadth of the clypeus not equaling half that of the pars thoracica; seen in profile, the back is nearly straight from the rather short posterior declivity to the eyes, slightly sloping between the eyes, the clypeus more abruptly sloping, with a transversal depression just under the eyes; its height is evidently greater than the length of the area occupied by the central eyes. The cephalic furrows and the hind central furrow are very distinct. Both the front and the hind row of eyes but very slightly curved backward (upward); the eyes of the front row appear to be a little larger than those of the hind row, and to be of equal size, the central ones at least not larger than the laterals; the hind laterals are perhaps slightly larger than the hind centrals. The area occupied by the central eyes is very nearly as long as broad behind, broader behind than in front; the interval between the fore lateral and central eyes is nearly double as small as that between these latter, which are separated by an interval about half again as great as the diameter of an eye; the space between the hind centrals is nearly half again as great as that between them and the hind laterals. The distance between the fore lateral and hind central eyes is double as great as that between the former and the fore centrals, and the distance between the fore and hind central eyes is much larger than that between the fore and hind laterals. The mandibles are perpendicular, covered with long hairs and several long, fine bristles; their length is not half again as great as the height of the clypeus. The palpi and legs are coarse, appressed hair, and armed with numerous long and rather fine spines; on the under part of the fore tibiæ, the spines are 2. 2. 2. The third and fourth pairs of legs are very nearly of the same length. The abdomen is much longer than broad, egg-shaped, covered above with coarse, appressed hair, especially on its paler parts; the vulva consists of a small, almost semici rcular depression, rounded in front and truncated behind, where it shows two longitudinal, low, short, and coarse, parallel costæ. Color.—The whole body above and the extremities are covered more or less thickly with coarse, appressed, whitish hair. The cephalothorax is dark brown, with a pale, brownish-gray, longitudinal, middle band behind, which only reaches to the pars cephalica, and is geminated by a blackish line behind; this band is only half as broad as the brown space on each side of it. Sternum, maxillæ, and labium, as also the coxæ be neath, pale grayish-brown; mandibles blackish-brown. Palpi and legs blackish-brown, with pale grayish-brown irregular rings, and paler toward the apex; the thighs have a rather broad pale ring at the base and another narrow ring near the middle, as also a pale patch at the apex; the patellæ have one such ring toward the base, the tibia one in the middle, and they are also more or less distinctly pale at the very apex; the metatarsi and tarsi are pale brownish, the former with three narrow black rings. The spines are mostly black, partly pale. The back of the abdomen is, on its anterior half, of a pale, slightly brownishgray color, this gray area being behind, on each side, limited by an oblique row of whitish spots continued down the sides of the abdomen; along the middle, this area shows a lanceolate band, reaching from the base to the middle of the back, and having on either side an oblique, short and narrow branch; the pale gray color on either side of the lanceolate band is continued backward in the form of a rather narrow middle band, gradually tapering toward the anus, and divided into spots by about four short, transversal, black lines; on the sides of this band the back is dark grayish-brown, and outward marked with a couple of large black spots, as also with a few smaller whitish ones. The appressed hair with which the back is covered is of a grayish-white color. The sides of the abdomen are blackish, sprinkled with small paler spots, and provided with a longitudinal, broad, irregular, whitish-gray band behind, upward; the belly is gray, with three longitudinal dusky bands converging backward. The vulva is pale brown, its costa black. |