BASILEUTERUS. 247 
at base and the tail shorter, so that the outstretched legs reach to 
or beyond the tip. The wings are more pointed. The colors be- 
neath are quite similar, not so pale along the median line ; the upper 
parts, however, much darker, the head lacks the blackish, and the 
fulvous of rump and basal half of tail are wanting in slragulatus. 
Cab. Mr. Lawrence. 
Smith-|Collec-, Sex | a ph 
sonian| tor’s | and Locality. Gontectad Received from Collected by 
No. No. | Age. | : 
34,096 ae fof | Panama R. R. | a0 G. N. Lawrence. Galbraith. 
ae 124 a0 ie ss 
IprorEs, Baird. 
Idiotes, BAinp. (See page 237.) (Type Setophaga rufifrons, Sw.) 
Bill broad at base, but quite deep, being nearly as high as wide; the culmen 
curved gently from the base, the lateral outlines straight; the bristles only 
moderate, reaching half way from nostrils to tip of bilf. Tail lengthened, 
longer than the short wings, and considerably graduated; the 4th quill | 
longest ; the 1st not longer than the 9th. Toes rather lengthened. 
The species of this group have generally been placed in Basi- 
leuterus. They, however, differ in having the bill narrower at base, 
and proportionally deeper, the bristles less developed, although the 
culmen is as much curved. The wings are much shorter, and the 
tail proportionally longer and more rounded, considerably exceeding 
the tail instead of being about equal to it. The transition, how- 
ever, is quite gradual through B. belli and I. mesochrysus, which, to 
some extent, combines the characters of both. 
Synopsis of Species of Idiotes. 
Back olive ; top of head chestnut (bordered with dusky in belli). 
Cheeks black. 
A white superciliary stripe. Beneath whitish - melanogenys. 
Cheeks chestnut; lores dusky. A superciliary stripe, and 
another beneath eye, white. Throat and breast yellow. 
Rest of under parts white, or only washed with 
yellowish . ° : : 2 . ° - rufifrons. 
Entire under parts yellow; crissum more fulvous. 
White infra-ocular stripe reaching behind ears. 
Chestnut of crown reaching the nape. Wings 
equal to lateral tail feather : - 5 . delattrii. 
Under parts and crissum yellow. Infra-ocular white 
not extending beyond eye. Chestnut of crown 
