476 NORTH AMERICAN BIRDS. 



bushes, in thickets. Eggs .68 X -48. Sab. Great 

 Plains, and prairie districts of Mississippi Valley, 

 north to Wyoming, Dakota, and Minnesota, east 

 across Illinois ; south, in winter, to southern Mexico. 

 633. V. bellii Aud. Bell's Vireo. 

 d 1 . Median lower parts same color as sides and flanks, only (usually) 

 paler. 

 e 1 . Lores and orbital ring yellow. 



f L - Larger (wing 2.40, or more). (Length about 5.00, wing 



2.40-2.60, exposed culmen .45-.52.) 



g 1 . Beneath dull whitish, tinged with olive-yellowish; 



above grayish olive, varying to dull olive-gray. 



Sab. Bahamas (New Providence, Abaco, Green 



Cay, Cat Island, and Eleuthera Island). 



V. crassirostris (Bryant). Large-billed Vireo. 1 



g*. Beneath deep sulphur-yellow or " King's yellow ;" 



above olive-green. Hab. Bahamas (Concepcion 



Island, Cat Island, Green Cay, Eum Cay, and 



Eleuthera Island). 



V. crassirostris flavescens Kibgw. Yellow Vireo. 2 

 /'. Smaller (wing not more than 2.25). 



In coloration intermediate between V. crassirostris 

 and V. crassirostris flavescens; wing 2.10-2.25, 

 tail 1.85-2.00, exposed culmen .40-.45. Sab. 

 Southern Mexico, Honduras, and Guatemala; 

 north to Yucatan and Mazatlan. 



V. ochraceus Salv. Ochraceous Vireo. 3 



e 2 . Lores and orbital ring dull whitish, the latter interrupted 



on upper eyelid. (Above plain olive or olive-grayish, 



becoming more decidedly olivaceous on rump, upper 



tail-coverts, and edges of secondaries and tail-feathers ; 



middle and greater wing-coverts broadly tipped with 



white, producing two very conspicuous bands across 



wing; lower parts dull olive-whitish, the sides and 



flanks more decidedly, but never conspicuously, tinged 



with olive.) 



/*. Darker colored, with shorter wing and tail and, usually, 



stouter bill ; above decidedly olive, becoming more 



1 Zanivireo crassirostris Bey ANT, Proc. Bost. Soc. N. H. vii. 1859, 112. Vireo crassirostris Baird, Review 

 Am. B. i. 1866, 368. 



2 New subspecies. Although occurring together with true V. crassirostris on several islands, this form 

 occurs exclusively on Rum Cay and Concepcion Island, while only the true V. crassirostris is found on Abaoo 

 and New Providence. The separation is based upon a very extensive collection (about 75 specimens), em- 

 bracing large series from several of the islands above named. 



3 Vireo ocliraceus Salv., P. Z. S. 1863, 188. 



