Goatsuckers. 



419. Merrill Parauque (Nyctidromus albicollis mer- 

 rilli). L. 12; T. 6.2. Outer tail-feather without 

 white. Two color phases, one gray, one rusty. Ad. 

 cT. Outer tail-feather black with sometimes a little 

 rusty, next feather white on inner web, third feather 

 white except at base. Ad. $. Outer tail-feathers 

 brownish with broken rusty bars; next two with white 

 at tip. Notes. A vigorous ker-whee-you repeated and 

 sometimes running into a whit-whit-whit, ker^whee-you. 



Range.— Mexico north to southern Texas; winters chiefly south of 

 Rio Grande. 



I 



420. Nighthawk {Chordsilss virginianus). L. 10; 

 W. 7.8. Primaries blackish with a white bar and no 

 ru>ty spots; darkest of our Nighthawks. Ad. rj 1 . 

 Above black with white and buff markings; throat and 

 band near end of tail white. Ad. 9- Throat rusty, no 

 white band in tail. Notes. A nasal peent\ and in the 

 breeding season, a booming sound produced by diving 

 from a height earthward. 



R -in ire. — Eistern United States, west to the Plains; breeds from 

 Fi >nda 10 LabraJor, west and northwest to northern California, British 

 Cu.umDia, and Alaska; winters south of United Stales. 



420a. Western Nighthawk (C. v. henryi). Simi- 

 lar to No. 420, but markings above rusty and more 

 numerous; telly washed with rusty. 



Range.— Wes'ern United States, east to the Plains, wintering south 

 of United States; exact distribution unknown. 



420b. Florida Nighthawk (C. v. chapmani). Simi- 

 lar to No. 420, but smaller (L. 8.6; W. 7.1;) and 

 paler; white and buff markings above larger and more 

 numerous. 



Range. Florida, west along Gulf Coast to eastern Texas; south in 

 winter to South America. 



420c. Sennett Nighthawk {C.v. sennetti). Simi- 

 lar to No. 420b, but still paler, white and buff prevail- 

 ing on back and scapulars; palest of our Nighthawks. 



Range.— Great Plains north to Saskatchewan; 

 Unitea States. 



winters south of th< 



42 1. Texan Nighthawk {Chordeiles acutipennis tex- 

 ensis). Wing quills with rusty spots; outer primary 

 shorter than one next to it; belly conspicuously washed 

 with rustv buff. Ad. rf. Throat-patch and band near 

 end of tail white. Ad. Q. No white band in tail. 

 Notes. A mewing call and a tapping accompanied by a 

 hamming sound. (Merrill.) 



Range.— Central America; breeding north to southern Texas, south- 

 ern New Mexico, southern Utah, southern Nevada, and Lat. 38 ° in 

 California; winters south of United States. 



157 



