CYPSELID.E. XXXVIII. 99 



partly feathered; toes slightly webbed at base, the hind 

 toe somewhat elevated. Genera fourteen; species one 

 hundred or more, widely diffused; chiefly insectivorous. 

 * Tail rounded ; rictal bristles very long. . ANTROSTOMUS, 1. 

 ** Tail forked ; rictal bristles inconspicuous. . CHORDEILES, 2. 



/. ANTROSTOMUS, Gould. WHIPPOORWILLS. 



1. A. vociferus, (Wils.) Bon. WHIPPOORWILL. NIGHT 

 JAR. Grayish, much variegated; pectoral bar and ends 

 of outer tail feathers white (<$) or tawny ($); rictal 

 bristles unbranched; L. 10; W. 6; T. 5. E. U. S., 

 abundant, nocturnal; noted for its "solemn and pro- 

 phetic" cry. 



2. A. carolinensis, (Gm.) Gould. CHUCKWILL'S WIDOW. 

 More reddish; rictal bristles with lateral filaments; L. 

 12; W. 9; T. 6. Southern, N. to Ills. (Nelson.) 



2. CHORDEILES, Swainson. NIGHT HAWKS. 



1. C. virginianus, (Gm.) Bon. NIGHT HAWK. BULL 

 BAT. Blackish, variegated; a large wing spot, bar 

 across tail, and V-shaped blotch on throat white in , 

 tawny or obscure in ?; L. 9; W. 8; T. 5. U.S.; 

 abundant. \C.popetue, (Vieill.) Bd.] 



FAMILY XXXVIIL CYPSELIDJE. 



(The Swifts.) 



Bill fissirostral, as in Caprimulgidce and Hirundinidce. 

 Wings very long, thin and pointed; secondaries very 

 short. Feet small, weak; hind toe often elevated or 

 otherwise turned; toes completely cleft. No rictal 

 bristles. Tail feathers 10; plumage compact. In most 

 species the salivary glands are highly developed, and 

 their secretion is used as a glue in the construction of 



