BASILEUTERUS. 249 
bright yellow, abruptly defined against the whitish of under parts. Inside 
and edge of wings yellow; flanks and crissum pale brownish-fulvous ; tibize 
‘more ashy. No spots or bands on wings or tail. The feathers along the 
middle of forehead and vertex with concealed yellow at the base. 
Length, 4.80; wing, 2.00; difference between 1st and 4th (longest) quills, 
.24; tail, 2.40; its graduation, .55; bill from gape, .55; tarsus, .80. 
This species is sometimes described as quite cinereous above ; 
this, however, depends on the state of plumage—perfect specimens 
being nearly as olivaceous as in delatirii. Occasionally specimens 
are found in which the line of demarcation behind of the yellow 
breast is obscured by the color passing backwards over the belly in 
a light wash pervading the whole under parts, the edges of the 
feathers brighter yellow, leaving the anal region, however, nearly 
white. The flanks, crissum, and tibie are then tinged with greenish 
olive. 
Smith-|Collec-) Sex When 
sonian| tor’s | and Locality. Received from Collected by 
No. Wo. | Age. Collected. 
13,624 dg te Mexico. rgd UGouldey eee meters 
30,876 | 132 a0 Mirador, Mex. Oct. 1862. Drocy Sartorius |) Gtsaes. 
28,026 $2 56 oe a Sd i Bilin tea tears tar stcr 
28,027 7 ie bh soc So eek | Ran ise ee 
26,375 on Bo Xalapa, as J. Krider, D’Oca. 
26,376 nc 2 Mexico. [Madre). sae ee AeA! Velie Widiarloccrac 
34,018 ake Re Mazatlan (Sierra | Dec. 1861. Aridi Guay Somes Ni Phi emetic seers 
(30,876.) Iris reddish-brown. 
Basileuterus delattrii. 
Basileuterus delattrii, Box. Comptes Rendus, XXXVIII, 1854, 383.—Is. 
Notes Orn. 1854, 63 (Nicaragua).—Scuarer, P. Z. S. 1860, 250 
(Orizaba).—Is. Catal. Am. Birds, 1861, 35, no. 211.—Scuarer & 
Satviy, Ibis, I, 1860, 274, Dueias (Guatemala), May 8. 
Hab. Mexico and Guatemala ? 
(No. 30,700.) Similar to rufifrons in color of head, the olive green of the 
back brighter, this color invading and replacing the ashy of the nape and 
sides of neck; the infra-ocular white band, less distinct behind, but appa- 
rently extending behind the eyes. Whole under parts greenish-yellow, a 
little paler on middle of belly; flanks olive green; the sides behind and 
crissum tinged with fulvous. Wings much rounded, about equal to the 
lateral tail feather ; 1st quill shorter, or not longer than the secondaries, as is 
the case in rufifrons. 
Total length, 5.10; wing, 2.10; tail, 2.70; graduation, .52; difference be- 
tween Ist and 4th quills (longest), .28 ; length of bill from nostril, .31 ; along 
gape, .60; tarsus, .82. 
Since receiving an authentic specimen from Mr. Salvin I have 
found that several specimens from Mexico, formerly considered to 
