CAPRIMULGUS. 383 
of Antrostomus, and this separation has been almost universally adopted by subsequent 
writers. Mr. Hartert, however, failing to find characters whereby to separate Antro- 
stomus from Caprimulgus, united them in his Catalogue under the latter name; in so 
doing, he followed up the hint thrown out by Mr. Sclater in his “ Notes on American 
Caprimulgide.” 
The tarsus in Caprimulgus, as in the three following genera, is more or less feathered 
in front, and is shorter than the middle toe including its claw; the tailis rounded; the 
head unadorned with ear-like tufts, but with distinct longitudinal markings. 
Of the forty-three species constituting the genus only seven occur within our limits. 
Two of these, C. carolinensis and C. vociferus, pass some way into North America; one, 
C. macromystax, occurs on the frontier and throughout Mexico and Guatemala; one, 
C. saturatus, is restricted to Costa Rica and Panama; one, C. yucatanicus, to Yucatan ; 
and one, C. salvini, to Mexico; the seventh is C. rufus, a southern species occurring as 
far north as Panama. 
The patterns of the plumage of all the Caprimulgide are very intricate, so much so 
that specific differences of coloration, though apparent to the eye, are not easily 
described in words. Torender the Mexican and Central-American species more readily 
distinguished the following key may serve :— 
A. Als, primariis in ambobus pogoniis maculatis. 
a. Rectrices tres externee macula magna, supra alba, infra isabellina. 
a'. Setee rictales filamentis lateralibus instructe . . . . . I. carolinensis. 
b!. Sete rictales simplices . . . . . . . . « 2 rufus. 
b. Rectrices tres externze macula magna, supra et subtus alba. 
c'. Macule caudales magne. 
a. Rectrices extern rotundate, macule albe extrorsum 
decrescentes. 
a", Macule caudales majores, caput summum in 
medio longitudinaliter striatum . . . . . 38. vociferus. 
6", Macule caudales minores, caput summum undique 
maculatum . . .... . » oe 6 « 4. macromystaz. 
6", Rectrices externe majus acute, maculz albee extrorsum 
increscentes . . . 2. 2. 6 ee we se ew we De Salvini. 
d'. Macule caudales minute, anguste . ... .. =. . 6. yucatanicus. 
B. Ale, primariis in pogonio interno unicoloribus, in pogonio externo 
tantum maculatis 7. saturatus. 
1. Caprimulgus carolinensis. 
Caprimulgus carolinensis, Gm. Syst. Nat. i. p. 1028* ; Wils. Am. Orn. v. p. 95, t. 54. f. 20°; Hartert, 
Cat. Birds Brit. Mus. xvi. p. 565°. 
Antrostomus carolinensis, Salv. Ibis, 1866, p. 195‘; P. Z. S. 1870, p. 203°; Lawr. Ann, Lye. 
N. Y. ix. p. 120°; v. Frantzius, J. f. Orn. 1869, p. 314’; Baird, Brew., & Ridgw. N. Am. 
