124 CASSIN'S MONOGRAPH OF HYDROPSALIS AND ANTROSTOMUS. 



Dimensions. — Total length of skin from tip of bill to end of tail about 9 inches ; 

 wing 4|; tail 4^ inches. 



Colors. — Entire plumage dark reddish brown, with very numerous transverse, 

 irregular lines and points of black and ashy gray, the latter predominating on the 

 breast and forming a broad pectoral band. Throat with a white collar before; quills 

 brownish black, with irregular bars of rufous; tail reddish brown, with bars of 

 brownish black. 



Hah. — South America. 



Ohs. — This handsome little species was first discovered in Peru by the learned 

 traveller, Dr. Tschudi. The expression relative to its color, " nigro-fuscus," does 

 not convey to me the idea of the color of this bird, though the figure is unmistakeable. 



(B.) The following species I have not seen; 



1. Antrostomus dominicus. Bonaparte, Conspectus Avium, p. 61. 



Orig. desc. : ** Similis prsecedenti " {A. vociferus) " sed obscurior, magis et 

 pulcherrime variegatus. Ex Insula St. Dominici." 



Obs. — Specimens of this species are in the Museum at Leyden. 



2. Antrotomus californianus. Bonaparte, Conspectus Avium, p. 61. 



Orig. desc. : " (Confer Capr. nuttallii, Aud. Am. 2d edit. t. 495) ex California. 

 Vix Turdi magnitudine. Mas. Griseus, nucha fulvescenti abdomine cervino, nigro 

 undulato ; gula macula utrinque alba nigro terminata : remigibus fuscis, macula 

 mediana alba, rectricibus lateralibus nigricantibus, extima late ad apicem Candida." 



Ohs. — I have never seen an Antrostomus with a white spot in the middle of the 

 quills: "remigibus fuscis, macula mediana alba." 



A gentleman of this Academy, well acquainted with the Caprimulgidse, and who 

 has recently visited Europe, informs me that the specimen in the Leyden Museum, 

 which is at present labelled ^^Antrostomus californianus, Bonap,, C nuttallii, Aud.? 

 California" is an Asiatic species of the typical Caprimulgus, of which genus no spe- 

 cies has yet been discovered in America. 



