582 CAl'KIMrLGlD^. 



a. cS ^^- sk. Hacienda de San Marcos, Za- Salvin-Godman Coll. 

 potlan, Jalisco, Mexico, May 11 

 ( W. Lloyd). 



This specimen differs from the type, a female, which is in a rather 

 rufous phase of plumage. The more rufous coloration may possibly 

 be peculiar to the female sex. 



4. STENOPSIS. n. 



lype. 

 Stenopsis, Caxs. Proc. Ac. Phil. v. p. 179 (18ol) .... S. cayenuensis. 



The genus Stenopsis is closely allied to Caprimidgiu^, and one 

 species of the latter { Oaprimulgus macuUcaudus) agrees with Stenopsis 

 in many points, but on account of the somewhat rounded tail must 

 nevertheless remain with Caprinv.dgiis. The most typical species of 

 Stenojms is no doubt »S'. cayennensis, which differs greatly from 

 Caprimulijus. The bill is more elongated and uot so broad ; the 

 nostrils are more exposed ; the wing is more rounded ; first primary 

 rather broad, almost equal to or very little shorter than the second 

 and third ; the tail is perfectly square or distinctly emarginate. The 

 sexes differ obviously. 



Ramje. Throiighout Southern America, north to Panama, south 

 to Northern Patagonia. 



Key to the Species. 



a. Primaries white at base in the male candicans, p. 5S2. 



b. Primaries browu or black at base. 



a'. Outer taiWeatbers in the male white for 



their greater part cayennensis, p. 583. 



b' . Outer tail-feathers in the male with large 

 white terminal spots. 

 a". General colour above deep brown or 



blackish ri'Jlcerv/.v, p. 584. 



6". General colour above greyish. 



a'". Wing about 6'2 inches lonyirostris, p. 585. 



b'". Wing about 5'4 inches decussata, p. 586. 



1. Stenopsis candicans. 



Ibiyau alas y cola blancas, Azara, Apunt. no. 314 (1805). 

 Oaprimulgus leucurus, Vieill. Nouv. Diet. x. p. 240, pt. ! (1817); id. 



£nc. MM. p. 544 (1823) ; Gray, Hand-l. i. p. 59 (1869)*. 

 Stenopsis candicans, Pelz. P. Z. S. 1866, p. 588 (Irisanga, S. Brazil : 



e.i- Natt. MS.) ; id. Orn. Bras. pp. 12, 49 (1867). 

 ? ( 2 ) Stenopsis langsdorffi, Pelz. P. Z. S. 1866, p. 689 ; id. Orn. Bras. 



pp. 12, 52 (1867). 



Male. Above whitish grey, here and there washed with ochraceous, 

 finely marbled with black ; top of the head with a blackish longi- 

 tudinal stripe ; scapulars with black streaks and ferruginous spots ; 

 larger wing-coverts and inner secondaries white ; primaries black, 



* Vieillot rel'ei's to Sfeiiopsin cayeimcusii! and to the present species, but the 

 description is that of .S. cai/ciinei/i-is. 



