188 Oherholser — Herr Birds from Paraguay. 



Arremon callistus sp. nov. 



Similar to Arremon poUonotus but upper parts darker; wings with 

 hardly any indication of a greenish yellow humeral patch; edge of wing 

 at bend, white; black jugular band wider. 



Cyanocompsa sterea sp. nov. 



Resembling Cyanocompsa cyanea but bill much smaller; blue of fore- 

 head less purplish; female much darker, less rufescent brown. 



Thamnophilus ochrus sp. nov. 



Resembles Thamnophilus cae/rulescens, but the female is very much 

 paler both above and below, with the breast pale grayish ochraceous, 

 the middle of abdomen buffy white, and all the superior wing-coverts 

 black tipped with white. 



Basileuterus leucoblepharus calus subsp. nov. 



Similar to Basilenterus UucohlephartiK leucoblepliarvs, bvit tianks grayish: 

 crissum very pale yellowish; sides and breast heavily shaded with slate 

 gray; back and rump less yellowish olive green. 



Picolaptes tenuirostris apolhetus subsp. nov. 



Similar to Picolaptes tenuirnstris tenvirostru but mvich smaller: the 

 shaft streaks on back decidedlv narrower. 



