STELGIDOPTERYX. 31% 
the faintly rufous throat, contrasting, not uniform, with the mouse 
brown of the breast; this brown only extends over the front of the 
breast, instead of reaching to the belly, which is faintly yellowish, 
not dull white. The crissum is quite the same in both. Young 
birds of the two species are so similar that I cannot distinguish 
them by the color. 
The species agrees with rujficollis, and differs from wropygialis, 
in the want of contrast of a pale rump and dark back. ‘The size 
is decidedly less. It differs from both in much paler fulvous of 
throat, less amount of sulphur yellow on the belly, and the want 
of the dusky brown tips of the longer of the under tail coverts. 
Smith- Cotlec-| Sex When 
sonian| tor’s | and Locality. Collected Received from Collected by 
No. No. | Age. ; 
738,154 =i Se Orizaba, Mex. Oe M: Botterin ot wo ue clarence 
26,373 27 Juy. Xalapa. bse J. Krider. D’Oca. 
30,716} 399 |ad.¢ Dueiias, Guat. Oct. 17, ’59. O. Salvin. Salvin & Godman. 
“ ae “ 
35,096} 405 | Juv. July 17, ’59. 
(35,096.) ‘Compared with type.” 
Stelgidopteryx uropygialis. 
Cotyle uropygialis, Lawr. Ibis, April, 1863, 181.—Is. Ann. N. Y. Lyc. 
(Panama). 
Cotyle flavigastra (Viet.), Scrater, P. Z. S. 1860, 274 (Babahoyo, 
Ecuador).— Cotyle ruficollis (V1EILu.), ScuATER, P. Z. S. 1860, 292 
(Esmeraldas, Ecuador). 
Hab. Isthmus Panama; southward along Andes. 
(No. 157, 5, type.) This species, if really distinct from ruficollis, resembles 
it very closely in most respects. It is, however, smaller, and the rump de- 
cidedly lighter, or pale grayish, in prominent contrast to the brown of the back. 
The rufous of the throat seems rather deeper, and the inside of wings darker. 
A specimen (17,792) differs in having the wings longer and more pointed, 
measuring 4.45, the extreme difference between tips of primaries 2.15, the 
tail 2.30. It may, however, be that the wing of the type is not fully grown. 
(No. 157.) Total length, 5.10; wing, 4.15; tail, 2.40, fork, .18; difference 
of primaries, 1.96; length of bill from forehead, .41, from nostril, .20, along 
gape, .55, width, .40; tarsus, .39; middle toe and claw, .52, claw alone, .18; 
hind toe and claw, .35, claw alone, .14. 
Smith- Icottec-| Sex 
; 5 When : 
sonian| tor’s | and Locality. Collected Received from Collected by 
No. No. | Age. oneored: 
17,792 | 175 Bc Isthmus Darien. Hoe Lt. Michler. A. Schott. 
Pe 157 oa Panama. ore Cab. Lawrence. M’Lean. & Galb. 
' (157.) Type. 
