188 Ober /wiser New Birds from Paraguay. 



Arremon callistus sp. nov. 



Similar to Arremon polionotus 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 caerulescens, 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 Basileuterus leucoblepharus leucoblepharus, but flanks 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 tenuirostris tenuirostris but much smaller; the 

 shaft streaks on back decidedly narrower. 



