STENOPSIS.—NYCTIDROMUS. 393 
the genus Stenopsis that enters our fauna. Here it occurs sparingly in the State of 
Panama and in Eastern Costa Rica. From the former country we have only received 
a pair, which formed part of one of our collector Arcé’s consignments ®. Subsequently 
a male was obtained in the district of Talamanca in Costa Rica by Mr. J. Cooper, the 
naturalist attached to Prof. Gabb’s expedition. This bird was described in 1875 by 
Mr. Lawrence as Stenopsis albicauda® 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 cf 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 Rio Branco 
on a tributary of the Rio 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. 
NYCTIDROMUS. 
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 tailis 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-chovre roux de la Guyane, D’Aub. Pi. Enl. 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, Burm. Syst. Ueb. ii. p. 389°; Scl. P.Z.S. 1866, p. 144°; Lawr. Aun. 
Lyc. N. Y. ix. pp. 120°, 2047; Mem. Bost. Soc. N. H. ii. p. 291°; Bull. U.S. Nat. Mus. 
no. 4, p. 831°; Cab. J. f. Orn. 1862, p. 166°; v. Frantz. J. f. Orn. 1869, p. 314"; Sel. & 
Salv. P. Z.S. 1870, p. 837°; Merrill, Bull. Nutt. Orn, Club, i. p. 88°; Boucard, P. Z. 8, 
1878, p. 67"; 1883, p. 451"; Nutting, Pr. U.S. Nat. Mus. v. p. 398"; vi. pp. 375%, 
386 *, 894°; Ferrari-Perez, Pr. U. S. Nat. Mus. ix. p. 158”; Ridgw. Pr. U. S. Nat. Mus. 
x. p. 592; Zeledon, An. Mus. Nac. Costa Rica, 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 americanus, Scl. (nec 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. CENTR.-AMER.. Aves, Vol. II., November 1894. 50 
