1866.] MR. SCLATER ON THE AMERICAN CAPRIMULGID^B. 135 



mens are before one ; but it is not easy to reconcile the conflicting 

 opinions as regards the synonyms of the older authors. 



Herr von Pelzeln informs me that Natterer's MS. name sapiti, 

 concerning which there has been so much discussion, is undoubtedly 

 referable to this species, having been formerly applied to it in Nat- 

 terer's catalogue. Natterer subsequently identified this species with 

 Caprimulgus semitorquatus, Gm. (PI. Enl. 734) ; but I follow Cas- 

 sin and Burmeister in considering that the latter synonym must be 

 referred to Lvrocalis gouldi. 



1 consider Caprimulgus hirandinaceus, Spix (Av. Bras. ii. pi. 3. 

 f. 1), probably identical with this species. The bill is drawn as 

 if bristled, it is true ; but that is also the case in the accompanying 

 figure of Chordeiles leucopygus. 



6. Chordeiles pusillus. 



Chordeiles pusilhts, Gould, P. Z. S. 1861, p. 182. 



Hab. S.E. Brazil, Lagoa Santa (Lund, in Mus. Hafn.) ; Fazenda 

 and Corunda, Brazil {Natt., no. 605). 



The diminutive size of this little species, together with the white 

 crissum and chestnut shoulders, render it unmistakeable. My spe- 

 cimens (from Natterer) measure as follows : — 



Localit. Long, tota, 



$ . Fazenda, July 1825 62 



? . Corunda, July 1825 60 



The remaining species of the subgenus varies greatly from the 

 typical coloration. This is 



7. Chordeiles rupestris. 



Caprimulgus rupestris, Spix, Av. Bras. ii. p. 2, pi. 2. 

 Chordeiles rupestris, Burm. Syst. Ueb. ii. p. 393. 



<5 . Supra cinereus, fusco variegatus : subtus albus ; pectore ciue- 

 rascente, fusco vario ; ventre fusco maculato : alis nigris, spe- 

 culo alari et secundariis intus albis : caudce rectricibus in po- 

 gonio interno (nisi duas mediae dorso concolores) albis, harum 

 apicibus nigris : long, tota 8"3, alee 6'7, caudce 3'7. 



2 . Mari similis, sed magis rufescens et coloribus minus puris. 

 Hab. Rocky Islands of Rio Negro (Spix) ; Lower Ucayali (Bart- 

 let t). 



Subgenus 2. Podoch<etes. 



8. Chordeiles letjcopygus. 



Caprimulgus leucopygus, Spix, Av. Bras. ii. p. 3, pi. 3. f. 2. 



Chordeiles leucopygus, Burm. Syst. Ueb. ii. p. 393. 



Lurocalis leucopygus, Cassin, Cat. Capr. 



Hab. Brazil, vie. of Para (Mus. Berol.) ; banks of the Amazon 

 (Spix) ; Matogrosso, Brazil, Nov. 1826 (Natt., sp. no. 761). 



Easily known by the want of any white wing-bar, the square white 

 mark on the three outer pairs of rectrices, and its short tarsi, 

 feathered down to the base. 



