HYDROPSALIS. — NYCTIDEOMUS. 3(;3 



primaiy-quills spotted with rufous on both webs, the foui'th barred 

 with white; middle tail-feathers heavily marked with grey, the 

 maikinos on the outer feathers much narrower and inclining to 

 ruCous ; tliroat and sides of face buffy-white with dark bars to the 

 feathers; remainder of the under surface brown barred with 

 white or buffy-white, the white increasing in extent on the 

 abdomen and under tail-coverts. 



Total length 240 mm., culmen 10, wing 15,5, tail IBJ:, tarsus 11. 



The male described was collected at Bartica. 



Adult female. Differs from the adult male in being smaller and 

 darker, with scarcely any wdiite in the plumage. The white bar 

 on the primary-quills in the male is represented by rufous spots 

 in the female. The white on the outer tail-feathers in the male is 

 entirelv absent in the tail of the female. Wing 148 mm. 



The description of the female is taken from an example in the 

 British Museum collected by Whitely at Karaakusa on the 10th of 

 March, 1882 — Salvin-Godman collection. 



Breedi/K/'Seasoii. Unknown. 



JCest. Unrecorded. 



Eggs. Und escribed. 



Range. Confined to British Guiana: Ituribisi River, Snpenaam 

 River, Bartica, Kamakabra River (McConnell collection); Kama- 

 kusa ( Whit el I/). 



Habits. Unrecorded. 



Genus NYCTIDROMITS Gould. 



JV//c//rIromffs (jould, Icones Avium, ii. pi. 2, ISyS. Type 3^. albicoJlis 

 (Giuel.j. 



238. Nyctidromus albicoUis, 

 White-neckkd Kight-Hawk, 



Caprimnlfjus alhlcoUis Gmel. Syst. Nat. i. p. 1030, 1780 (CayeniR-) ; 

 Cab. in Schoml>. Jteis. Guian. iii. p. 710, 1818. 



Nyctidromus alhicollis Salvin, Ibis, 1885, p. 439 (Bartica Grove) ; 

 Hartert, Cat. B. Brit. Mus. xvi. p. 587, 1892 (Demerara) ; Heebi', 

 Our Search for a Wilderness, pp. 148, 203, 1910 (Morawbanna, Lower 

 CuyuJii; ; Brabourne ct Chubb, B. S. Auier. i. p. lOO, uo. 948, 1912. 



Adult male. General colour above and below rufous brown 

 minutely freckled, mottled, and barrod or lined with bhiekish ; 

 wings coarsely spotted with orange-bnll and the scapulars broa<lly 

 margined with the same colour ; priniaiy-(|iiills lihickish with a 

 while bar on the outer three ; middle tail-feathers similar to the 



