52^ BULLETIN" 50, UNITED STATES NATIONAL MUSEUM. 



A[ntrostoimis] v[ociferus] arizonx Coues, Key, 2d ed., 1884, 452. 

 A[ntrostomus] vociferus arizonae Ridgway, Man. N. Am. Birds, 1887, 299. 

 Caprimulgus vociferus arizonx Ridgway, Bull. Nutt. Om. Club, vii, Oct., 1882, 

 258. 



ANTROSTOMUS (VOCIFERUS?) CHIAPENSIS Nelson. 



CHIAPAS WHIPPOORWILL. 



Similar to A. v. macromystax but adult male much darker, both 

 above and below, with inner webs of primaries wholly dusky or with 

 only a few very small rufous-tawny spots on inner quills. 



Adult male. — General color of upper parts brown, vermiculated, 

 barred, and blotched with black and spotted with dull rufous-tawny; 

 pileum brownish gray, finely vermiculated with dusky, narrowly 

 streaked laterally with black and heavily spotted medially with the 

 same, the spots coalescing so as to form a broad median irregular 

 stripe; scapulars with black prevailing, but this broken by bars and 

 spots of light dull rufous-tawny, which on inner webs is paler and 

 broken by coarse vermiculations of blackish; interscapular region 

 and upper rump dusky, indistinctly barred and freckled with light 

 tawny-brown, the lower rump and upper tail-coverts similar in color 

 but the light tawny-brown markings larger, more spotUke; middle 

 pair of rectrices light tawny-brown shaded with brownish gray, 

 coarsely and irregularly vermiculated with dusky and crossed by 

 irregular, very broken, V-shaped bars of brownish black; next pair 

 of rectrices brownish black broken by small mottlings of hght tawny- 

 brown, segregated into spothke areas; three outer pairs of rectrices 

 extensively white distally (the white area diminishing in extent, 

 from about 47 mm. on the third to about 34 mm. on inner web of the 

 outermost), the remaining portion brownish black," broken (except 

 toward the white) by indications of bars of segregated light tawny- 

 brown mottlings; lesser wing-coverts brownish black, barred with 

 light tawny-brown; middle and greater coverts blackish, spotted 

 with ocliraceous-buff, some of the spots broken by dusky vermicula- 

 tions ; primaries and primary coverts brownish black, spotted on outer 

 web with tawny-ochraceous, the terminal portion nearly uniform 

 grayish dusky; loral region ochraceous-buff, slightly mottled with 

 dusky; auricular and suborbital regions nearly uniform blackish 

 brown; chin and throat rather broadly barred with brownish black 

 and ochraceous-buff, the latter becoming paler buff (and the bars 

 wider) on sides of throat; a narrow band of white, tinged or suffused 

 with buff, across lower throat; rest of under parts dull buff, broken 

 by coarse spotting and barring of blackish brown on chest and breast, 

 and by regular bars of the same on abdomen and flanks, the under 



a On the outermost rectrix the white tip is confined on outer web to a cuneate space 

 about 20 mm. long, measured along the shaft. 



