HYDROPSALIS AND ANTROSTOxMUS. 119 



Iris dark brown, ring of the eye yellowish brown, bill black, the root passing into 

 yellowish red, nostrils round, elevated, feet grayish flesh colored, toes darker, claws 

 blackish. 



Total length 11 inches; stretch of wings 18§ inches; tail projects beyond the 

 point of the wing 2 J inches. 



The female is described as having a more reddish brown ground color, with the 

 abdomen yellowish white, with blackish transverse bands, tail tridentate without 

 white. Young like the female. 



Ohs. — A striking character of this species is that the tail feathers are white in the 

 middle, except the two in the centre of the tail, the color of which is not stated. No 

 figure of this species has been published. 



The description given is not sufficient, but it appears to me to indicate a species 

 of my genus Stenopsis, (Proc. Acad. v. p. 179,) rather than an Hydropsalis, and 

 ought to be compared with aS. cayennensis, (Gm.) Buff. PL Enl. 760, and Jardine 

 and Selby's Illustrations, ii. pi. 87. 



II. Genus Antrostomus. Nuttall, Manual of the Ornithology of the United States 

 and Canada, i. p. 739. (Boston, 1840.) 

 Original description: "Bill extremely short, feeble, opening to beyond the eyes; 

 upper mandible arched, contracted towards the compressed tip ; lower mandible a 

 little decurved. Nostrils basal, oval, prominent, covered above by a membrane. 

 Head very large, as well as the eyes and ears. Feet very short, tarsus partly 

 feathered, fore toes 3, connected by membranes to the second joint, middle toe 

 pectinated. Bristles of the mouth conspicuous. Wings long, rather falcate ; 2d and 

 3d quills longest, tail ample, even." 



Added by me. Throat usually with an uninterrupted semicollar of white ; quills 

 with irregular bars of rufous, but without white ; tail with the external feathers 

 usually broadly tipped with white. 



Obs. — Nuttall, as above, and various other authors, cite " Gould " as the founder 

 of this genus. I have met with no such description, and must therefore consider the 

 proper authority to be the eminent naturalist whom I have given. 



This genus appears to be exclusively American, and is more nearly related to 

 typical Caprimulgus than any other of this country. 



(A.) The species which I have seen are : 

 1. Antrostomus carolinensis. (Gm.) Aud. B. of America, pi. 52, 

 Caprimulgus carolinensis. Gmelin, Syst. Nat. ii. p. 1028. 

 Caprimulgus lucifugus. Bartram, Travels, p. 292. 



Caprimulgus rufus. Vieill. Ois. d'Am. Sept. i. p. 57, pi. 25, (not Gmelin.) 

 Caprimulgus hracliypterus. Stephens, Gen. Zool. x. pt. 1, p. 150. 



