March 3 1 " 

 1902 . 



BANGS TWO SAN MIGUEL BIRDS 



73 



Vireo insulanus sp. nov. 



Type, from San Miguel Island, Bay of Panama, $ adult, no. 4947, coll. of 

 E. A. and O. Bangs, collected April 29, 1900, by W. W. Brown, Jr. 



Characters. — Similar to V. flavoviridis, but much smaller; general colora- 

 tion paler, the yellow of sides and under tail coverts paler as well as duller — 

 slightly greener ; back grayer olive green; wing formula as in V. flavoviridis, 

 i. e. , outer primary intermediate in length between fourth and fifth (counting 

 from outside). In V. olivacens the outer primary equals or exceeds the fourth, 

 while in V. chivi agilis the outer primary equals the fifth. 



The male is considerably larger than the female, as appears to be the case 

 with all the species of this group — Vireosylva. In color the sexes are 

 alike. Mr. Brown notes that, in freshly killed specimens, the "iris is red, the 

 tarsus plumbeous." 



measurements (in millimeters). 



Vireo insalanus Bangs. 





Vireo flavoviridis ( C assin) . 



Exposed 



Vireo chivi agilis (Licht.). 



