134 MR. SC'LATER ON THE AMERICAN CAPRIMULGI DM. [Feb. 27, 



4. Chordeiles TEXENSIS. 



Chordeiles texensis, Lawr. ; Baird, B. N. A. p. 154 ; Sclater, Cat. 

 p. 2/9. 



Hub. Valley of Rio Grande and southwards, west to Gulf of Ca- 

 lifornia {Baird); Mexico; Guatemala {Salvin); Nicaragua (Salvin). 



This species, although very closely allied to the common South- 

 Ameiican Chordeiles acutipennis, is, I think, distinct. It is of larger 

 size, has longer-wings, and has the larger wing-coverts and primaries 

 beyond them, nearly down to the white bar, marked with distinct ru- 

 fous spots on the outer web. These spots are certainly apparent in 

 the females and younger birds of Ch. acutipennis, but are hardly 

 seen in the adult males. I subjoin a table of measurements of a 

 series of the two species in Mr. Salvin's collection and my own : — 



Localit. Long, tota, 



C. texenm, $ Guatemala 8-7 



$ Kealejo, Nio 8-3 



$ Guatemala 8-3 



? Guatemala 8-7 



9 Guatemala 8-2 



$ Guatemala 8"4 



C. acutipennis, $ Brazil 7'7 



? Brazil 7"7 



<j Cayenne 7"8 



$ Tobago 7-6 



ij> South America .... 7'3 



5. Chordeiles acutipennis. 



Caprimulyus acutipennis, Bodd. (ex Buff. PI. Enl. 732). 



C. acutus, Gm. S. N. i. p. 1031. 



Chordeiles acutus, Cassin, Pr. Acad. Phil. v. p. 188 ; Burm. Syst. 

 Ueb. ii. p. 395. 



C. labeculatus, Jard. Ann. & Mag. N. H. 1846, p. 118. 



C. acutipennis, Cassin, Cat. Capr. 



Caprimulgus sapiti, Natt. in Mus.Vindob. (no. 94) ; Bp.Consp.p. 63. 



Hub. Tobago (Kirk) ; Cayenne (Buff.) ; S.E. Brazil, coast-region 

 j(Burtn.) ; Rio Brancho aud Rio Negro (Natt.). 



This is a very common South-American species. It comes nearest 

 to C. texensis, but, as I have already shown, is of inferior dimensions, 

 and is not so much spotted with rufous on the outer primaries. 



I cannot make out what Chordeiles brasilianus, Cassin (ex Gmelin) 

 (Pr. Acad. Phil. v. p. 187) is. Burmeister also gives a species of 

 Chordeiles as Brazilian, under the name Chordeiles pruinosus (Syst. 

 Ueb. ii. p. 394), and makes it identical with Cassin's C. brasilianus. 

 Cassin gives no description of his species. According to Burmeister 

 it is very closely allied to the present*; but he mentions that the 

 Jive first primaries are barred with white. If this be really the case, 

 the species is probably C. viryinianus ; but that is a much larger 

 bird than the present. As I have already stated, there is not much 

 difficulty in separating the species of Capriimdyidce when the speci- 



* Of C. acutus he says, " Gestalt urid Grosse ganz wie bei den vorigen Art. 

 i. e. C. bratffianus" (I. <\ p. 39fi). 



