BIEDS OF NOETH AND MIDDLE AMEEICA. 657 



Bill small and relatively very narrow, feathered on top as far as 

 strils, or slightly farther. Nostril (apparently) narrowly oval, 

 mitubular, opening laterally. Wing rather long and pointed, the 

 igest primaries exceeding distal secondaries by one-third the length 

 wing; seventh and eighth primaries longest, the ninth very slightly 

 orter, the tenth (outermost) slightly shorter than sixth. Tail 

 yen-eighths as long as wing, or slightly more, slightly rounded, the 

 itrices widening distally, with broadly rounded or obhquely sub- 

 ancate tip. Tarsus as long as middle toe with claw. 

 Plumage and coloration. — ^Prefrontal feathers erect, those on meso- 

 inium short and without bristly tips; rictal bristles extremely long 

 it very slender and but slightly if at all incurved terminally; 

 ithers of pileum rather narrow, narrowly rounded at tip ; feathers 

 loral and superciliary regions not erect, not forming a projecting 

 Ige along sides of pileum; latero-occipital feathers somewhat elon- 

 ted but not pointed, without bristly tips, and not forming distinct 

 ar-tufts"; feathers of chest elongated, forming a conspicuous 

 BctUe lappet or "apron," the posterior edge of which is abruptly 

 fined against the much shorter and dififerently colored plumage of 

 e breast; plumage in general very soft, with velvety surface. Gen- 

 al color chestnut-brown, much broken by dusky mottlings, ver- 

 Lculations, and streaks, the scapulars with conspicuous angular or 

 neate spots of black; pileum streaked with black; a white band 

 ross lower throat; rectrices (except middle pair) tipped with white; 

 kaaries banded or spotted with cinnamon-buff and dusky. , 

 Bange. — Southeastern Mexico (Yucatan and Campeche). (Mono- 

 pic.) 



NYCTAGREUS YUCATANICUS (Hartert). 



YUCATAN POORWILL. 



Adult male (hrown phase) ? " — General color of upper parts rather 

 ep grayish brown (nearest sepia or bistre), the lateral portions of 

 ieum (broadly), more decidedly grayish, nearly everywhere minutely 

 rmiculated with dusky and with more or less distinct mesial strea]^ 

 black, these broader and sublanceolate on median portion of pileum, 

 .d on scapulars (especially the more posterior ones) stiU broader, 



' The specimen from which the description is taken is not sexed, but I assume that 

 is a male from the difference in pattern of the white tip to the two outer rectrices 

 m that of a female, this difference corresponding with the sexual difference in 

 alasnoptilus, a closely related form. The difference in general coloration, assumed 

 represent a "grayish phase" and a "rufescent phase," respectively, may be in 

 lity merely a sexual difference. 



Since the above was put in type an adult male, collected by G. F. (Jaumer, at 

 lac, Yucatan, has been examined. This is in the grayish brown plumage described 

 )ve, thus confirming the suggested sexual difference in coloration.] 



