

1)1) 



882 



REVIEW OP AMERICABT BIRDS. 



[part I. 



1.40; length of bill from forehead, .55, from noatril, .34, along gape, .62; 

 tarsus, .CO. 



The comparison of many specimens of the grayheaded Hylophilus 

 of Guatemala, with others from Panama, exhibits, on the wliole, the 

 differences referred to, as stated by Mr. Lawrence, but they are ex- 

 ceedingly slight, and may not unreasonably be referred to the influ- 

 ence of season or locality. Of the three types of Mr. Lawrence, 

 two, in which the olive green of the cap is most distinct, and the 

 size least, are decidedly immature birds ; the third (No. 400), how- 

 ever, is adult, and although the color referred to is reduced in 

 amount, it is still quite appreciable. • 



Unmistakably auult specimens from Costa Rica and Nicaragua 

 are still smaller than those from Panama, as shown by the measure- 

 ments given above. They are even brighter yellowish above than 

 in the type, the edges of some of the feathers almost yellow. Com- 

 pared with Guatemalan skins of unmistakable decurtatus, the 

 difference is very appreciable. ; , ■ ...j ,•, ^. ,.,3} 



A young bird, scarcely full fledged, has the olive of back soiled 

 with buff, the top of head is dull sepia brown, and the olive of back 

 is tinged with the same. 



I am not satisfied as to th" existence of more than one species, 

 but for the present retain pusilltis, and await further evidence to 

 determine the question. , ; . ■->" 



(400.) Type. (401.) Type. (174.) Type. 



't — 



X ... 1. 



i V !• ^ 



ir: 





LALETES, ScLATBB. 

 Laletes, Sciatbr, P. Z. S. 1861, 72. (Type L. osburnti.) 



General appearance that of a Vireo. The rather pointed wings, are longer 

 tlian the narrow, nearly even, slightly rounded tail. P'irst primary about lialf 

 the second, which about equals secondaries ; the 4th quill longest. Bill deep 

 and much compressed from base ; depth two-tliirds the distance from nostril to 

 tip. Culmen straight for basal tliird, then decurvirig to the hooked, deeply 

 notched bill ; gonys also curved. Commissure slightly arched. I^ostriU 



