. XIV 208. Chiton (Lepidopleurus) janeirensis Gray. One anterior plate. Payta. The above determination rests upon a single plate (anterior) in good condition. Of the 211 species contained in the above list,* 90 are carried farther south than heretofore reported, by 64 miles, the least, to 3,195, the greatest extension in range; also one species detected not before collected or reported, and one new species and genus added to the fauna of the coast. The increase in southerly range of these 90 is as follows: One example from beach. Chatham Island, Galapagos. The National Collection also contains examples from Callao and Valparaiso. On page 317, number 85, read This form does not=fusiformis Blve., not Bloc, as printed. * Including these additional species given below. DESCRIPTIONS OF NEW GENERA, SPECIES, AND SUBSPECIES OF BIRDS FROM COSTA RICA. BY GEORGE K. CHERRIE, Taxidermist and Ornithologist of the Costa Rica National Museum. Through the kindness of the authorities of the Smithsonian Institu tion I have been permitted to compare the specimens contained in a small collection of birds brought with me from Costa Rica with the more extensive series belonging to the U. S. National Museum, every facility for the work being given me, together with assistance by the curator of the Department of Birds, as well as by Dr. Leonard Stejneger, especially in the matters of nomenclature and synonymy. Notes on additional species are deferred until I can return to Costa Rica and have access to the large collection belonging to the Museo Nacional at San José. In the following descriptions I have employed Mr. Ridgway's nomenclature in the naming of colors. Lophotriccus squamicristatus minor, subsp. nov. Mr. Ridgway having directed my attention to the decided difference in color between the Costa Rican birds and true squamicristatus, from Colombia, I have made a careful examination of the birds from the two localities and deem the differences such as to warrant the separation of the Costa Rica bird as a good geographical race, which I have named minor from its smaller size. From the true squamicristatus it is readily distinguished by the slightly brighter olive-green above, by the decidedly more yellowish or yellowish-green color below and its extension farther onto the breast, the under wing coverts being a little deeper yellowish, and lastly, in smaller size, the wing measuring 1.901.96, instead of 2.05-2.16, and the tail 1.68-1.72, instead of 1.82-2. (Type No. 35305 8, U. S. National Museum, Grecia, Costa Rica, December 1, 1864; F. Carmiol.) Lophotriccus zeledoni, sp. nov. Another bird from Costa Rica in the U. S. National Museum collection deserves attention, differing as it does from both squamicristatus and squamicristatus minor in being bright olive-green above, with a brownish shading on the hind neck. On the head the crest feathers are not nearly so well developed, the color at their base being not nearly Proceedings National Museum, Vol. XIV-No. 855. Proc. N. M. 91--22 337 so deep a black, while the rufous tips and edges are broader; the wings and tail are dusky, the latter edged with the color of the back and the former with olive-yellow, brightest and lightest on the inner secondaries; lesser wing coverts like the back, middle coverts lighter like the edging to the remiges, greater coverts with similar edges but having an orange shade. Below, chin and throat grayish white; breast, sides, and flanks greenish-yellow; abdomen and under wing coverts yellow (nearly the primrose of Ridgway's "Nomenclature".) Striations on the under parts are obsolete. The size is considerably smaller; wing, 1.70; tail, 1.50. To this apparently new bird I have given the name Lophotriccus zeledoni, taking pleasure in this opportunity to show some appreciation to Sr. Don José C. Zeledon for many favors, personal and otherwise. The type of the new form is No. 47492, Collection U. S. National Museum, Dota, Costa Rica, October 4, 1867; F. Carmiol. Pachyrhamphus ornatus, sp. nov. Adult female (type No. 42951, collection U. S. National Museum, Barranca, Costa Rica, February 26, 1866; J. Carmiol); above olivegreen, wings and tail dusky-blackish, rectrices broadly tipped with cinnamomeous, primaries and secondaries edged with the same color, the inner secondaries broadly so; wing coverts tipped with tawnycinnamon, greater and middle series broadly so. Crown and neck rufous-chestnut; supraloral stripe extending to just above the eye and including the nasal plumes on the forehead, white; lores blackish. A supra-auricular stripe extending from above the eye and crossing the occiput, black. Below, chin whitish, throat and breast greenish oliveyellow, abdomen and crissum canary-yellow; axillaries under wing cov erts and inner edges of quills pale yellowish. Maxilla dusky blackish; mandible dusky plumbeous; feet and legs dusky. Length of wing, 2.86; tail, 2.53; exposed culmen, 0.54; nostril to tip of bill, 0.42; gonys, 0.34; tarsus, 0.74. HABITAT: Costa Rica. Deconychura, gen. nov. Like Sittasomus and Glyphorhynchus in the great extension of the stiffened stems of the rectrices beyond the webs of the feathers, but having ten rectrices instead of twelve. The bill is very like that of Sittasomus, slightly compressed for the terminal half and slightly depressed and widened for the basal half; gonys just appreciably ascending; bill a little longer in proportion, being as long as the head. The pattern of coloration is much as in Glyphorhynchus, being uniform above, the throat lighter colored and the breast spotted, but the pattern on the wing is very different from either the latter or Sittasomus, both of which have the secondaries and inner primaries marked with a conspicuous light patch on the inner webs, followed by a darker . XIV area, the tips like the outer webs. In Deconychura the inner webs of the remiges are paler, but there is no lighter patch. The generic name here chosen refers to the peculiarities of the tail, with ten rectrices having the stiffened stems extended beyond the webs and bent down, being derived from dɛna ten, oyu claw, and oupa tail. Deconychura typica, sp. nov. * Adult female (type No. 119943, collection U. S. National Museum, Pozo Azul, Costa Rica, September 7, 1889; J. C. Zeledon); above light bister with umber-brown shading; feathers of the crown with blackish edgings and narrow faint buffy shaft streaks, these shaft streaks also seen on the hind neck. Wings, tail, and upper tail coverts between a chocolate and chestnut brown; wing coverts like the back; remiges shaded on the edges with the color of the back. Lores, superciliary stripe and sides of head soiled buffy or pale clay color, with dusky blackish or brownish shading. Chin and throat pale clay color; remaining lower parts light olive-brown with umber shading; feathers of the breast with blackish edges and central guttate spots of pale clay color, the spots growing fainter posteriorly until ou the crissum they are only represented by faint shaft streaks. Under wing coverts ochraceous, inner edges of quills vinaceous cinnamon with an ochraceous shade. "Feet, legs, and lower mandible plumbeous; upper mandible black; iris dark brown" (Zeledon, MS.). Wing rather long, third and fourth quills longest, first equal to eighth, second longer than fifth. Length, 7.00; wing, 3.56; tail, 3.96; culmen, 0.92; nostril to tip of bill, 0.58; gonys, 0.52; tarsi, 0.80. HABITAT: Costa Rica and Panama. There is another specimen in the U. S. National Museum from Panama (Aspinwall) in immature plumage and with the bill broken off at the nostrils. Premnoplex, gen. nov. (type, Margarornis brunnescens Lawr.). I have before me four of the six recognized species of the genus Margarornis ; namely, squamigera, stellata, rubiginosa, and brunnescens. The latter presents peculiarities in the pattern of coloration and structure that have led me to place it in a new genus, Premnoplex,† which I would characterize as similar to Margarornis, but wing short and rounded, and much more concave, while the second primary is shorter than the sixth, not longer; quills only faintly edged with lighter on the inner webs and no patch at the base of the feathers, extending to the shaft on the inner webs of a pale fulvous color. This light-colored area in squamigera, stellata, and rubiginosa, commences on the third primary and extends across the secondaries, increasing in length along the web on each suc * No. 3320, collection Museo Nacional de Costa Rica. trunk of tree and ŋŋ66 strike. |