BASILEUTERUS, 



251 



Basileuterus chrijsophri/s, Boxap. Consp. 1S50, 314. — ScLATER, P. Z. S. 

 1857, 202 (Xalapa). 

 Ilab. Mexico and Guatemala. 



(No. 32,468.) Above olive green ; crown and cheeks orange brown. Entire 

 under parts, including edge of wings, greenisb-yellow, the sides and lining 

 of wings olivaceous. A broad stripe of yellow from the bill over the eye ; 

 the two stripes separated on the forehead by black, which is continued, more 

 obscurely, along the top of head, so as to separate the yellow stripe from tlie 

 brown vertex. 



The orange brown of the cheeks extends narrowly above, more broadly 

 below the eye to the bill, involving the lores. The yellow stripe extends on 

 the nape some distance beyond the rufous crown. Bill black ; legs yellowish. 

 Wings a little shorter than tail. 



Total length, 5.10 ; wing, 2.28 ; tail, 2.50 ; graduation, .32 ; dilference be- 

 tween 1st quill and 4th, .32; length of bill from forehead, .49, from nostril, 

 .28 ; along gape, .55 ; tarsus, .80 ; middle toe and claw, .61. 



Myiothlypis, Cabanis. (See page 237.) 



Myiothljjpis, Cab. Mus. Hein. I, 1850, 17. 

 tatus, Laf.') 



(Type Trichas nigrocris- 



Bill much depressed, very flat, th^ culmen and commissure almost truly 

 straight, the bill tapering only gradually to near the tip, where it is more 

 rapidly rounded oif, so that the lateral outlines are at first slightly concave, 

 and then convex at the tip, somewhat as in Todus or T oil i rostrum, but more 

 tapering. Rictal bristles reaching a little beyond the nostrils. Wings a little 

 shorter than the tail ; the 1st to 4th quills much graduated, so that the 1st 

 is equal only to the shortest secondary ; the 2d to the 9th quill ; the 3d is be- 

 tween the 6th and 7th ; the 4th and 5th longest. The tail is moderately 

 graduated, though the feathers are pointed. The legs are stout and strong ; 

 the outside of the tarsi apparently with the scutellae passing entirely round 

 to the posterior edge. Head with a narrow pointed crest. 



This is a stronu'ly marked genus, and easily distinguished from 

 Basileuterus by the very flat, straight bill, much broader or less 



■ Basileuterus nigricristatus. 



Trichas nigrocrisiatus, Lafr. Rev. Zool. 1840, 230 (Bogota). — Myiothb/pis 

 n. Cab. Mus. Hein. 1, 1850, 17. — Basileuterus n. Sclater, Catal. 1861, 

 36. — Basileuterus nigricapillus, Sclater, P. Z. S. 1860, 74. 



