STENOPSIS.— NTCTIDEOMUS. 39S 



the genus Stenopsis that enters our fauna. Here it occurs sparingly in the State of 

 Panama and in Eastern Costa Eica. From the former country we have only received 

 a pair, which formed part of one of our collector Arce s consignments ^. Subsequently 

 a male was obtained in the district of Talamanca in Costa Eica by Mr. J. Cooper, the 

 naturalist attached to Prof. Gabb's expedition. This bird was described in 1875 by 

 Mr. Lawrence as Stenopsis alUcauda ^ and distinguished from S. cayennensis by its 

 longer tail with narrower feathers, the absence of the transverse median black bar on 

 the tail-feathers, and the darker rufous colour of the abdomen and under tail-coverts. 

 These prove to be all variable characters and are not confirmed by our Panama 

 specimens. 



In South America S. cayennensis has been found over a wide area and has been 

 recorded from Guiana, the islands of Tobago and Trinidad, from Forte do Eio Branco 

 on a tributary of the Eio Negro, and thence along the northern districts of the 

 continent to Colombia. In the latter country it is occasionally met with by the bird- 

 hunters of Bogota, and was found by Salmon in the State of Antioquia. 



We are not acquainted with any account of its breeding-habits or of its eggs. 



NYCTIDEOMUS. 



Nyctidromus, Gould, Icon. Av. ii. t. 2 (1838) ; Hartert^ Cat. Birds Brit. Mus. xvi. p. 587. 



The only species of this genus differs in several characters from the typical members 

 of Caprimulgus and the preceding genera. The habits are more terrestrial, and, perhaps 

 in consequence, the tarsus is bare and longer in proportion to the toes ; the tail is long 

 and peculiarly marked, the conspicuous white marks of the male being on the second 

 and third feathers from the outside and not on the outer feather. 



The range of the genus is that of its only species and is given below. 



1. Nyctidromus albicollis. 



Tette-cMvre roux de la Guyane, D'Aub. PI. Eal. 733 (?) '. 



Caprimulgus albicollis, Gm. Syst. Nat. i. p. 1030 '^ ; Licht. Preis-Verz. ^Mex., Vog. p. 3 {cf. J. f. 



Orn. 1863, p. 58) \ 

 Nyctidromus albicollis, Bttrm. Syst. Ueb. ii. p. 389*; Scl. P. Z. S. 1866, p. 144%- Lawr. Ann. 



Lye. N. Y. ix. pp. 120', 204 ^ Mem. Bost. Soc. N. H. ii. p. 291'; Bull. U. S. Nat. Mus. 



no. 4, p. 31 »; Cab. J. f. Orn. 1862, p. 166"; v. Frantz. J. f. Orn. 1869, p. 314"; Scl. & 



Salv. P. Z. S. 1870, p. 837'^; Merrill, Bull. Nutt. Orn. Club, i. p. 88 " ; Boucard, P. Z. S, 



1878, p. &7^*; 1883, p. 451 "■ Nutting, Pr. U. S. Nat. Mus. v. p. 398 '^ vi. pp. 375 ", 



386 '^ 394"; Ferrari-Perez, Pr. U. S. Nat. Mus. ix. p. 158'°; Kidgw. Pr.U. S. Nat. Mus. 



X. p. 592 " ; Zeledon, An. Mus. Nac. Costa Eica, 1887, p. 120 " ; Herrera, La Nat. (2) i. 



pp. 179, 322 ='; Salv. Ibis, 1889, p. 368"; Stone, Pr. Ac. Phil. 1890, p. 206'°; Hartert, 



Cat. Birds Brit. Mus. xvi. p. 587 ='. 

 Nyctidromus americanvs, ScL (nee Linn.), P.Z. S. 1856, p. 285"; 1859, p. 367'"; Scl. & Salv. 



Ibis, 1859, p. 125''; Lawr. Ann. Lye. N. Y. vii. p. 290'°. 

 BIOL. CENTK.-AMEB., Aves, Vol. II., November 1894. 50 



