412 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
what intermediate between the last two, I propose the generic name 
Chlorothraupis.* 
4. Tachyphonus nitidissimus Salv. 
An adult male from Pirris (No. 91822, May, 1883; Juan Zeledon) 
agrees with a typical example from Veragua, except that the brownish 
orange crown-patch is more deeply colored. 
5. Tachyphonus luctuosus Lafr. & D’Orb. 
Two Costa Rican specimens (No. 68158, Talamanca, and 91821, Dos 
Novillos, December) agree exactly with specimens from Panama, Bogota, 
Guayaquil, Demerara and Brazil (Eng. do Gama); but No. 59044, é ad., 
from Tuiz (Carmiol, coll.), has a small, though distinct, spot of straw- 
yellow on the crown, thus showing an approach to 7. nitidissimus. 
6. Chlorospingus pileatus Salvin. 
A male, apparently immature, differs from an unquestionable adult in 
the following particuiars: The dark color of the head is of a quite differ- 
ent shade, being dull slate-color instead of blackish fuliginous; the olive- 
green on the upper parts is paler, as is also the yellowish olive of the 
lower parts. 
A young specimen in first plumage (No. 91824, Pirris, 1882; J. Cooper) 
has the head colored as in the preceding, but upper parts are a dull 
olive, with little green tinge, except on the wings and tail, while the 
lower parts are almost entirely dull light grayish, inclining to white on 
the abdomen, the sides and flanks, however, especially the latter, tinged 
with olive-green. The mandible is whitish, whereas in the adults it is 
deep black, like the maxilla. 
7. Lanio melanopygius Ridgw. 
Lanio leucothorax melanopygius Ripaw. Pr. U. 8. Nat. Mus. 1883,” Sanv. & 
Gop. Biol. Centr. Am. Aves, Vol. I, Dec. 1883, 305. 
A single adult male from Pirris differs from two others, apparently 
quite adult (Nos. 47445, Angostura, Jan. 10, 1867, J. Carmiol, and 39036, 
Payuriqui, March 14, 1865, same collector), in having the whole rump 
solid deep black instead of bright yellow, the crissum black instead of 
yellow, and the black of the wings and tail much more intense. The 
differences are in fact so great that a difference of race at least seems 
quite likely. The original description of the species (Proc. Zool. Soe. 
Lond., 1864, p. 581) does not mention the color of the rump; but the 
plate in Hxotic Ornithology (plate 32) represents unmistakably the black- 
rumped form. It appears from the text, however, that the figure of the 
male may have been taken from a Veraguan example, from which we 
may infer that Veraguan specimens and those from the southern portion 
of Costa Rica agree in having the whole rump deep black. Should the 
*In their Biologia Centrali- Americana, Aves, V ols Lg Pood (December, 188. jy Mesers. 
SALVIN & GODMAN have already adopted this name from my MS., quoting ‘‘Pr. U.S. 
Nat. Mus., 1883,” the quotation in question having reference to the present article 
which was submitted for publication early in August, 1883. Messrs. SALVIN & GoD- 
MAN include along with C. carmioli the Orthogonys olivaceus of Cassin; but my type of 
the genus Chlorothraupis is Phenicothraupis carmioli Lawr. 
