242 REVIEW OF AMERICAN BIRDS. [PART I. 
and 9th, are common to all. The relationship to Myiodioctes is quite 
close, especially to canadensis and pusillus ; but the. characters just 
mentioned will distinguish them. The transition, however, to Idvotes 
is very gradual, through such species as I. mesochrysus. Setophaga 
is distinguished by a much more depressed and thinner bill, with 
the culmen and commissure nearly straight for most of the length, 
as well as by other features. 
Synopsis of Species of Basileuterus. 
Top of head with two black stripes inclosing a median of 
yellow or orange. No rufous on sides of head. 
Beneath entirelf yellow. 
Central stripe of head orange brown, mixed 
with gray. Back olive green. 
Supra-ocular stripe and eyelids whitish vermivorus,! Cab 
Supra-ocular stripe and eyelids yellow 
(mot seen) . . - : . bivittatus, Scl. 
Central stripe of head yellow, sometimes mixed 
with orange. Back olivaceous-ash. 
Supra-ocular stripe and eyelids yellow- 
ish-green 5 = 3 “ . culicivorus, Bp. 
Chin and throat gray; rest of under parts yellow. 
Back olive. Supra-ocular stripe ash color? 
Central stripe of head brownish-orange . - coronatus,? Sel. 
Central stripe of head yellow; throat darker 
ash (not seen) - 2 - . cinereicollis, Sel. 
Top of head with two black stripes inclosing a median of 
ash, or nearly unicolor ashy or brown. No rufous on 
sides of head. Beneath whitish, or not bright yellow. 
Back olive green, uniform with rump. 
Top and sides of head ash, scarcely lighter in 
centre. Supra-ocular line and eyelids white. [Scl. 
Sides tinged with olive green . : - leucoblepharum$ 
' A species—B. hypoleucus, Bp.—from Brazil, is said to differ in being white 
beneath. 
2 B. viridicata, Burm. Il, 113 (D’Orb. Voyage, IX, 325) appears quite similar, 
with the vertex stripe yellow, not orange. In this respect it agrees with cinerei- 
collis (Scuater, P. Z. 8. 1864, 166, Bogota), and like it has a grayish-ashy 
throat, tinged with greenish. The difference I am unable to state. Basileu- 
terus chrysogaster, of Peru (Setophaga chrys. Tscnupt, F. P. 192), is said to be 
yellow beneath, olive green above, a little darker on top of head where the 
feathers are yellow at base, and orange in middle. 
° Basileuterus leucoblepharum, Scu. Catal. p. 36. A Paraguayan, and conse- 
quently a typical specimen, has the whole top of head uniform slaty gray, 
