178 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



hh. Paler and grayer; adult male averaging, wing 61.6, tail 50.2, 

 exposed culmen 11.4, tarsus 19.8; adult female, wing 59, tail 

 46.7, exposed culmen 11, tarsus 19.2. (Southern Florida, includ- 

 ing Keys. ) Vireo noveboracensis maynardi, adults (p. 186) 



gg. Smaller; adult male averaging wing 57.4, tail 47.4, exposed culmen 

 8.9, tarsus 19.9; adult female, wing 56.1, tail 46.3, exposed culmen 

 9.7, tarsus 19.8. (Southern Texas, and north-central Mexico.) 



Vireo noveboracensis micrus, adults (p. 186) 

 ee. Supraloral stripe and eyelids yellowish white; thmat and chest very pale 

 gray, contrasting with white of abdomen. Vireo noveboracensis, young. «) 

 dd. Under parts unicolored, or at least not distinctly hicolored, never pure 

 white medially. 

 e. Supraloral stripe terminating on anterior portion of upper eyelid, the 

 orbital ring interrupted above by a dusky spot on middle of upper 

 eyelid, 

 f. Under parts distinctly yellowish or decidedly tinged with yellow. 

 g. Supraloral stripe deep lemon or saffron yellow, conspicuously deeper 

 and brighter than dingy yellow of under parts. (Southeastern 



Mexico.) = Vireo perquisitor, adults (p. 187) 



gg. Supraloral stripe pale yellow, little if any deeper or brighter than 

 color of under parts. 

 /(. Wing-bands very narrow; dusky supraorbital spot large and con- 

 spicuous. (Cuba.) Vireo gundlacbii, adults (p. 188) 



hh. Wing-bands broad; dusky supraorbital sjiot small, inconspicuous. 

 i. Larger (wing 58-66, tail 44-54). ( Vireo crassirostris. ) 

 j. Coloration duller and grayer, the under parts less yellow. 



(Bahamas.) Vireo crassirostris crassirostris, adults (p. 189) 



2;'- Coloration brighter, more olive-green above, more decidedly 

 yellow l)eneath. 

 k. Coloration deeper; slightly larger (wing 58-66); tail more 

 even. 



I. Upper parts olive-green; wing-bands narrower. (Baha- 



mas.) Vireo crassirostris flavescens, adults (p. 191) 



II. Upper parts olive-brown; wing-bands broader. (Islands 



of Grand Cayman and Cayman Brae, south of Cuba. ) 



Vireo crassirostris alleni, adults (p. 192) 

 kk. Coloration paler; slightly smaller (wing 61); tail more 

 rounded. (Island of Old Providence, Caribbean Sea. ) 



Vireo crassirostris approximans, adults (p. 192) 

 //. Smaller (wing 51-57, tail 40-47). (Southern Mexico to Nica- 

 ragua.) Vireo ochraceus, adults (p. 193) 



ff. Under parts not distinctly, if at all, yellowish, but dull whitish or very 

 pale olive-buffy, or buffy olive. 

 (J. Smaller (wing 55, tail 46) with larger bill (exposed culmen 12); upper 

 parts olive-gray; under parts entirely dull white. (Western Nica- 

 ragua. ) Vireo pallens, adults (p. 194) 



gg. Larger (wing 59-70, tail 47-55), with smaller bill (exjaosed culmen 



8.5-11); upper parts greenish olive to grayish olive; under parts 



more or less strongly shaded with pale olive or buffy. ( Vireo 



huttoni. ) 



/(. Darker, with upper parts distinctly olive and under parts strongly 



washed with buffy olive. 



« I have not enough material to enable me to make a satisfactory key to the young 

 of the several subspecies. 



