convex from the posterior margin to very near the hind central eyes; height of clypeus about one-third of the length of the mandibles and as great as the length of the area of the central eyes, which is nearly as long as broad behind, much broader behind than in front; lateral eyes larger than centrals, contiguous; fore laterals about double as large as fore centrals, which are nearly contiguous; interval between the hind central eyes larger than their diameter and than the interval between them and the hind laterals; mandibles but slightly convex above; palpi and legs yellowish; abdomen short, brownish or olivaceous-gray.—? ad. Length about 2 millim. Female.-Cephalothorax longer than broad, about as long as patella and tibia of the fourth pair together; the pars thoracica moderately rounded in the sides, narrowed and slightly sinuated at the pars cephalica, which is rather strongly narrowing forward, with rounded sides, and with the forehead rounded and nearly half as broad as the pars thoracica; seen in profile, the cephalothorax is rather low, slightly and gradually rising and somewhat convex from the posterior margin to very near the hind central eyes, then, with the area of the central eyes, sloping forward, the clypeus sloping still more strongly forward or downward; the cephalic impressions are well marked, the whole surface smooth and shining. The sternum is large, nearly as broad as long, broadly truncate in front, nearly heart-shaped, slightly convex, very smooth and shining. The hind row of eyes, seen from above, is straight, the front row, seen from before, is slightly curved upward; the lateral eyes are contiguous, oblong, and larger than the central eyes, the fore laterals about double as large as the fore centrals, which are the smallest of the eight; the central eyes occupy an area a little shorter than broad behind, much broader behind than in front; the hind central eyes are separated from each other by an interval evidently greater than their diameter from the hind laterals by an interval equaling half their di ameter, and from the fore centrals by an interval at least as large as their diameter; the fore centrals are very close together, nearly contiguous, and separated from the fore laterals by a space equaling half their diameter; their distance from the margin of the clypeus is as great as the length of the area of the central eyes. Mandibles somewhat thicker than the fore thighs, somewhat more than double as long as broad, their length being nearly three times as great as the height of the clypeus; they are but slightly convex above, somewhat narrowing toward the apex on the inner side; their claw-furrow is armed with teeth of moderate length and the claw is rather long and slender. The maxillæ are longish, nearly ovate, slightly inclined toward the broad labium, which is rounded at tip. The palpi are of moderate strength, the patellar joint scarcely half again as long as broad, the tibial joint not double as long as the patellar, the tarsal joint but very slightly narrowing toward the obtuse apex; the legs are rather slender, the tibiæ of the fourth pair about four times as long as the patellæ. Abdomen not much longer than broad, elliptical, shining, almost hairless, like the cephalothorax; the vulva appears to consist of a rather large low tubercle, divided into three parts by a transverse angularly forward bent furrow and a middle longitudinal furrow proceeding backward from the angle of the former (?). Color.-Cephalothorax yellowish-brown, the extreme lateral margins blackish. When the animal is placed in water or in spirit of wine, it shows three fine longitudinal blackish lines along the pars cephalica. Sternum of a dark, sooty, testaceous hue. Mandibles yellowish-brown; maxilla and labium testaceous. Palpi yellowish, with black bristles; legs yel. lowish, with slight brownish or reddish tint. Abdomen dark brownish or olivaceous gray, darker on the under part; the vulva brownisb. Length of body 2, of cephalothorax nearly 1 millim.; length of legs I nearly 3, of tibia + patella IV nearly 1 millim. A single somewhat mutilated example was captured at Arapaho Peak (11-12,000 feet above the level of the sea), July 7. By the arrangement and relative sizes of its eyes, this species shows some transition to Pholcomma Thor., in which genus, however, the lateral and especially the hind central eyes are, compared with the small fore central eyes, much larger than in E. strabo, and the hind central eyes contiguous with the hind laterals. 6. S. distincta n. Gen. STEATODA (Sund.), 1833. Cephalothorax reddish; legs reddish, with black rings; the thighs of the fourth pair and all the tibiæ and tarsi black at the apex, the anterior thighs black, reddish at the base; abdomen black or piceous, with white markings; a broken band surrounding the anterior margin, a row of 3-4 spots along the back, an oblique line on each side, and a short transverse line in front of the mamille below; first and fourth pair of legs of the same length; vulva nearly w-formed.-9 ad. Length about ૬ 6 millim. Female.-Cephalothorax shorter than patella and tibia together of the fourth pair, somewhat longer than broad, much narrowed anteriorly, but slightly sinuated at the pars cephalica; the pars thoracica strongly and amply rounded in the sides, the pars cephalica small, narrowing forward, with the forehead rounded and not half as broad as the pars thoracica; the surface is smooth and shining, the cephalic impressions strong; besides them, there are three short shallow radiating depressions on each side; the ordinary middle fovea is large and deep, situated somewhat behind the centrum, just behind the coxæ of the second pair; seen from the side, the cephalothorax is nearly horizontal in front of the middle fovea, neither very high nor elevated anteriorly; the clypeus is broader than high, its height being about as great as the length of a ine formed by three eyes of the front row; it has a strong transverse depression under the front row of eyes, and is convex and somewhat sloping seen in profile. The sternum is rather large, of a short ovate form, truncate in front, but slightly convex, very densely and finely im. presso-punctate, hairy. The eyes are somewhat large, the anterior central ones a little smaller than the others; the hind row is straight, the front row slightly curved downward; the four central eyes form a nearly perfect square, the area occupied by them being scarcely perceptibly shorter than broad and scarcely broader behind than in front; the lateral eyes are contiguous, the interval between the posterior cen tral eyes is nearly as large as their diameter and slightly larger than the interval between the hind central and lateral eyes, which interval is evidently smaller than the diameter of one of these eyes; the anterior central eyes, which are placed on a strong blunt protuberance, are separated from each other by an interval as large as the diameter of these eyes and little larger than that which separates them from the anterior lateral eyes. The mandibles are perpendicular, nearly cylindrical, very slightly convex longitudinally, smooth and shining, and hairy, especially at the apex and on the inner side; their length is more than double their breadth, and nearly double as great as the height of the clypeus; the length of the claw is scarcely greater than the basal breadth of the mandibles. Maxillæ oblong, rounded at tip, and also slightly rounded on the outer side, straight on the inner, and inclined toward the labium, which is rounded on the sides, narrowing toward the rounded extremity, and about as long as wide at the base. The tibial joint of the palpi is scarcely double as long as broad, but very slightly and gradually incrassated toward the apex; the tarsal joint is a little narrower, and tapers gradually toward the blunt apex; it is about as long as the two preceding joints taken together. The legs, like the palpi, are shortish, and covered with coarse hairs; the first and fourth pair of legs are of equal length; the metatarsus of the fourth pair is scarcely longer than the tibia. The abdomen is oblong, somewhat inversely ovate, and rather broadly rounded at the extremities, not very high, shining, and somewhat hairy; the belly shows a very distinct spiracle between the mamillæ and the rima genitalis. The vulva consists of two large rounded shallow foveæ open on the inner side; the depression formed by these two fovea, which is open in front, and is limited posteriorly by a sinuated ridge, has nearly the form of a Greek w. Color.-Cephalothorax rusty-red, the eye-area and mandibles in general darker, brownish or blackish. Sternum, maxillæ, and labium reddishbrown. Palpi blackish or piceous, with more or less distinct reddish rings. Legs of a bright rusty-red color, the thighs of the fourth pair, as also the tibiæ and tarsi (and sometimes even the metatarsi), black at the apex, the anterior thighs black, red at the base. Abdomen black or piceous, with white spots; its anterior margin is surrounded by a white, narrow band, broken in the middle, and not reaching the middle of the sides; along the middle of the back is a series of three or four spots, gradually diminishing in size backward, the first of these spots being situated somewhat before, and the second somewhat behind, the middle of the back; in the middle of each side is an oblique white line, and the belly has in front of the mamille a short white line, or transverse spot curved a little backward. Length of body 6 millim.; length of cephalothorax 2, breadth 15 millim.; length of abdomen 4 millim. Length of legs: I 8, II 7, III 51, IV 8 millim.; patella + tibia IV 24 millim. A few specimens of this fine species were collected at Manitou, Colo., June 12. Gen. LITHYPHANTES Thor., 1869. 7. L. corollatus (Linn.). SYN.-1758.-Aranea corollata Linn., Syst. Nat., ed. 10, i, p. 621. 1778.-Aranea albomaculata De Geer, Mém., vii, p. 257, pl. 15, figs. 2–4. 1870.-Lithyphantes corollatus Thor., Rem. on Syn., 1, p. 92. A few specimens of this species were captured at Idaho Springs, Colo., July 5, a female in Boulder, Colo., June 29, and a male in Denver, Colo., July 10. A larger variety (female), almost totally black, only marked along the belly with a whitish middle line, crossed by a short line of the same color at its hind extremity, was found at Manitou, Colo., July 12. 8. Ph. pullulus Hentz. Fam. SCYTODOIDÆ. Subfam. PHOLCINE. Gen. PHOLCUs Walck., 1805. SYN.-1850.-Theridion? pullulum Hentz, Descr. and Fig. of the Aran. of the Pale testaceous; cephalothorax with a black central band along the pars thoracica, which band is forked in front; abdomen not much longer than broad, whitish-gray, with black spots, the spots on the back forming two longitudinal rows; tarsal part of the male's palpi with a long, narrow process below, the bulbus drawn out into a strong, compressed beak.- ad. Long. circa 23 millim. Mas.-Cephalothorax at least as broad as long, inversely orbiculatecordiform, with a middle furrow, which is forked anteriorly, here forming the very deep cephalic expressions; pars cephalica high, the clypeus very high and sloping. Sternum large and broad, almost semicircular, truncated in front. Eyes: three larger ones on each side and two small ones in the middle; the hind row of eyes is nearly straight; the front row strongly curved downward, its eyes being all contiguous, or very nearly so; the three eyes on each side also nearly touch each other, forming a triangle open inward; the interval between the posterior central eyes is fully as large as the diameter of one of these eyes, which are evidently larger than the posterior lateral ones, and perhaps a little larger also than the anterior laterals; these latter are double as large as the anterior central eyes. Mandibles coalesced along the inner side, free only at the apex, which has a finepointed spine at the inner angle; they are small and short, seen from in front slightly tapering toward the broadly truncated apex, seen in profile conical. They are not half as long again as broad at the base, and their length does not equal half the height of the clypeus; near the base, in front, they are armed with a very long and strong spine directed forward and somewhat downward, and curved downward at the apex. The claw is slender, but slightly curved, as long as the mandible is broad at the apex. Mamilla narrow, longish, dilated at the base, inclined toward the labium, which is triangular, rather broader than long, slightly rounded at the sides. Palpi very thick, but slender at the base. The femoral joint is strongly thickened at the apex, clavate, the patellar joint, which has a few long straight black hairs at the very apex above, is very short, appearing, seen from the side, to form a wedge between the femoral and tibial joints; this latter is, seen from above, somewhat longer than broad and subcylindrical, seen from the side much shorter below; the tarsal joint again is very short, as short as the patellar, and is on the under side drawn out into a downward directed, very long, straight, narrow, blunt process, or spine, closely applied along the bulb and its beak; the bulbus, which forms the extremity of the palpus, is very simple, thick, nearly ovate, with the extremity drawn out into a strong, rather long, compressed beak, somewhat tapering toward the oblique and blunt apex, which appears to be provided with a few minute teeth, or spines. Legs very slender, long, the first pair (which are mutilated in the only specimen examined) no doubt the longest, second and fourth pairs nearly equal; the patellæ very short. The unguicular article of the tarsi is not very distinct except in the third pair of legs, the tarsi of which, except at the base, are divided into 10-12 short joints; also in the other tarsi there appear to be traces of segmentation. The superior claws are long, equably curved, densely beset with long comb-teeth; the inferior claw is small, with one tooth. Abdomen, seen from above, a little longer than broad, seen from the side about as high as long, globoso pyriform, with the mamille placed near the middle of the belly. Color.-Cephalothorax pale testaceous, with a somewhat unequal black band along the middle of the pars thoracica, which band is forked in front, here inclosing the hind extremity of the pars cephalica. The eyes are surrounded by a narrow black ring. The sternum (with the coxæ) is of a whitish testaceous color. The parts of the mouth are pale testaceous, the legs of the same color, black-haired. The abdomen is grayish-white, with two rows of rather large rounded black spots along the back; the space between these rows has a whitish band, or line, along the middle, which in front includes a darker, somewhat lanceolate band; also the sides of the abdomen are black-spotted.. Length of body 23, of cephalothorax 14 millim. Legs: (I?), II 131, III 11, IV 133 millim. (Thighs I 44, II and IV 33 millim.) A single male example of this curious spider, which no doubt is identi |