522 Field Museum of Natural History — Zoology, Vol. IX. 



Length, about 12; wing, 8.25; tail, 5.50; bill, .45. 



The Chuck-will's-widow is a southern species which occurs casu- 

 ally in southern Illinois. Ridgway found it not uncommon as far 

 north as Mount Carmel. (Orn. of Illinois, 1889, p. 367.) 



Mr. Otto Widmann states it is a fairly common summer resident 

 in Missouri "from Perry County southwestward along the southern 

 slope of the Ozark Mountains, from the latter part of April to the 

 end of September" (Birds of Missouri, 1907, p. 128). It has not been 

 observed in Wisconsin. 



199. Antrostomus vociferus (Wils.). 

 Whip-poor-will. 



Distr. : Eastern North America, from Great Plains to the Atlan- 

 tic, and from southern Canada to Mexico, Central America, and 

 northern West Indies. 



Adult male: Smaller than the preceding species, bristles of the 

 mouth, without lateral filaments; plumage, soft; bill, small; mouth, 



large; general plumage, mixed gray, tawny and black; the crown, 

 streaked with black; throat, blackish, mixed with tawny; a narrow 

 white band on the breast ; belly, tawny buff, irregularly marked with 

 black; primaries, dark brown, marked with imperfect rufous bars; 

 tail, grayish, mottled with black and buffy white; the three outer 

 feathers broadly tipped with white (the second and third for about two 

 inches) . 



