PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 143 



■whether they should not all be iucluded under Caprimulgus. The only 

 alternative seems to be a liirther subdivision of one or more of the so- 

 called genera, especially '■'■Antrostomus''\ leaving A. carolinensis as the 

 typical and only species, referring A. vocifenis to Ca])rimulgus^ and insti- 

 tuting a new genus for A. nuttalli. The following scheme may serve to 

 show the nature of the differences between the tbree North American 

 species usually included in Antrosfomus and the genus Nyctidroimis : — 



A. — Tarsus feathered in front almost to the toes, aud shorter thau the middle toe ; first 

 quill longer than the fourth. 



1. Caprimulgus. — Eictal bristles without lateral tilanieuts. Sexes with the tail 



differently marked. Tail rounded. (Including C. rociferus.) 



2. "Antkostomus." — Rictal bristles -with fine lateral filaments. Sexes with the 



tail differently marked. Tail rounded. (Including only the type, A. caroli- 

 nensis.) 

 B, — Tarsus entirely naked in front, and longer than the middle toe ; first quill shorter 

 than the fourth. 



3. — Tail even, much shorter than the wing. Sexes with the tail not difterently 

 marked. Plumage with a peculiarly soft, velvety surface. (C. ntittalli only.) 



4. Nyctidromus. — Tail rounded, equal to the wing. Sexes with the tail differently 

 marked. 



116. * Nyctidromus albicoUis. — Pauraque Goatsucker. 



Montvoyan de la Giiyane, Buff., Hist. Nat. des Ois. VI, 1779, 549. 



Crepaud-volant ou, Tette-Chevre roux, de la Guiane, Buff., PI. Enl. 733 (:=9 )• 



White-throated Goatsuclccr, LiXTU ., Synop. II, i»t. ii, 1785, .596, No. 7. 



Guiana Goatsucker, Lath., t. c. 598, No. 9. 



Caprimulgus albicolUs, Gmel., S. N. I, ii, 1788, 1030 (ex Lath., I. c). — Lath., Ind. 

 Orn. II, 1790, 575, No. 7.— Vieill., Euc. M€th. 1823, 536, No. 4.— Light., 

 Verz. Doubl. 1823, 59, 606.— D'Orb., Guerin's Mag. 1837, 67.— IIartl., Ind. 

 Azara, 1847, 20, 310.— D'Orb. & Lafr., Rev. Zool. 1837, 67.— Caban., in 

 SciiOMB. Guiana, III, 1848, 710, No. 204. 

 Nyctidromus albicoUis, Burm., Th. Bras. II, 1856, 389, No. 1.— Scl., P. Z. S. 1866, 

 124 (fig. of bones of foot), 144 (S. Mexico to S. Brazil).— SCL. & SALV.,i6. 

 193 (Ucayali, E. Peru); 1867, 752 (Huallaga, E. Peru), 978 (LFpper Ama- 

 zon) ; 1869, 252 (Maruria, Venezuela), 598 (Conispata, Peru) ; 1870, 782 (S. 

 of Merida, Venezuela), 837 (coast of Honduras); 1873, 186 (Peru), 290 (E. 

 Peru); 1875, 237 (Venezuela); Nom. Neotr. 1873, 97 (Central America; S. 

 Am. to Brazil).— Lawr., Ann. Lye. N. Y. IX, 1869, 204 (Yucatan); Pr. 

 Boston Soc. 1871, — (Tres Marias Islands, W. Mexico; common); Mem. 

 Bo-ton Soc. II, 1874, 291 (Mazatlan, Colima, and Tres Marias, W. Mexico); 

 Bull. U. S. Nat. Mus. No. 4, 1876, 31 (Isth. Tehuantepec).— Wyatt, Ibis, 

 1871, 375 (L. Paturia, New Granada).— Lee, Ibis, 1873, 134 (Buenos 

 Ayres). — Layard, i&. 389 (Para).— Merrill, Bull. Nutt. Orn. Club, I.Nov. 

 1876,88 (Fort Brown, Texas, April and May; not rare; breeding). 



Caprimulgus guiavensis, Gmel., S. N. I, ii, 1788, 1030 (based on Buff., PI. Enl. 

 733). -Lath., lud, Orn. II, 1790, 586, No. 8.— Max. Beitr. Ill, 1831, 318, No. 4. 

 Nyctidromus guianensis, Cass., P. A. N. S. 1851, 183, 189 (Cayenne ; Surinam); 

 Catal. Caprim. Mus. Phila. Acad. 1851, 12.— Burm., Syst. Ueb. II, 1856, 

 391.— Sol., Catal. Am. B. 1862,281, No. 1690 (Orizaba; Bogota; Vera Paz; 

 Esmeraldas, Ecuador ; Trinidad) ; P. Z. S. 1864, 176 (City of Mexico). — 

 Taylor, Ibis, 1864, 90 (Trinidad).— Lawr., Ann. Lye. N. Y. VII, 1861,290 

 (Isth.Panama;.— Scl. & Salv., P. Z.S. 1864,364 (Isth. Panama).— Pelz., 

 Orn. Bras. 1871, 13.— Salvix, P. Z. S. 1870, 204 (Veragua). 



