138 MR. SCLATER ON THE AMERICAN CAPRIM ULGID^E. [Feb. 27, 



Caprimulgus ocellatus, Tsch. Consp. Av., et Faun. Per. pi. 5. f. 2. 



C. brasi/iensis, Tsch. F. P. p. 125. 



Antrostomus ocellatus, Cassin, Proc. Acad. Phil. v. p. 183 ; ejusd. 

 Mamm. et Orn. Expl. Exp. p. 187; Burm. Syst. Ueb. ii. p. 386. 



Caprimulgus lunulatus, Natt. MS. (no. 518). 



Hab. South-eastern Brazil (Max.) ; wood-region of Eastern Peru 

 (Tschudi) ; Ypanema, Brazil (Mus. Berol.). 



Remarkable for the elongation forwards of the loral plumes, some- 

 what as in JEgotheles. 



Sect. B. Speculo alari albo. 



8. Antrostomus nigrescent. 



Caprimulgus nigrescens, Cab. in Schomb. Guian. hi. p. 710. 

 C. semitorquatus, Gray & Mitch. Gen. Birds, i. pi. 17. 

 Stenopsis nigrescens, Cass. Cat. Capr. 

 Antrostomus nigrescens, Cab. et Hein. Mus. Hein. iii. p. 91. 



3 . Nigricans rufo maculatus : subtus niger, albido-rufescente 

 regulariter transvittatus : vitta gulari, macula in remigum 

 ii di , iii 1 , et iv 1 pogouiis internis et rectricum lateralium apicibus 

 albis: long, tota 7'5, alee 5'5, caudce 3'7. 



$ . Mari similis, seel maculis remigum et rectricum nullis. 



Hab. British Guiana (Schomb.) ; Para and Rio Negro (Natt. sp. 

 no. 880) ; New Granada (Mus. P. L. S.). 



9. Antrostomus parvulus. (PI. XIII.) 



Caprimulgus parvulus, Gould, P. Z. S. 1837, p. 22, et Zool. Voy. 

 Beagle, iii. p. 37. 



" Caprimulgus mucins, Licht." Natt. no. 357. 



d . Nigro rufoque variegatus, pileo summo nigro, maculis in tec- 

 tricum alarium apicibus albis : subtus fulvus, nigro transradia- 

 tus : remigum ii dl , iii 1 , et iv' vitta et rectricum lateralium api- 

 cibus albis : long, tota 7"5, alee 5*3, caudee 4. 

 2 . Mari similis, sed maculis remigum et rectricum albis nullis. 

 Hab. Banks of the Parana near Santa Fe, La Plata (Darwin) ; 

 South Brazil, Villa Maria, Sept. 1825 (Natt.). 



I doubt much whether Peale's C. eequicaudatus (Zool. Expl. Exp. 

 Birds, p. 168) can be identical with this species, as supposed by Mr. 

 Cassin (Mamm. & Orn. Expl. Exp. p. 188, Atlas, pi. 13. f. 1). It 

 is from Callao, Peru, a very different locality. 



The female specimen of my pair (collected by Natterer) agrees 

 perfectly with Mr. Gould's type now in the British Museum, and I 

 have seen another example in Sir William Jardine's collection. 



Genus 5. Stenopsis. 



The three species which I refer to this genus all have a broad and 

 distinct white bar across the first four primaries. They may be 

 diagnosed as follows : — 





