362 BIRDS OF BRITISH GUIANA. 



230. Lurocalis semitorquatus. 



Semi-collared Night-hawk. 



Caprimrdgus semitorqiiatus Gmel. Syst. Nat. i. p. 1031, 1789 (Cayenne). 

 Lurocalis semitorrpiatus Salviii, Ibis, 1885, p. 488 (Bartica Grove) ; 



Hai'tert. Cat. B. Brit. Mus. xvi. p. ()21, 1892 (Takutu River) ; 



Brabourne & Cbubb, B. S. Anier. i. p. 99, no. 93.5, 1912. 



Adult male. Entire upper surface, sides of face, and breast 

 blackish brown variously marked with buff and white, being 

 coarser on the tail and flioht-quills, the white being most con- 

 spicuous on the sides of the neck, scapulars, and long innermost 

 secondaries; abroad band of white across the throat; abdomen, 

 under tail-coverts, and under wing-coverts rust-colour barred 

 with dark brown. 



Total length 212 mm., culmen 12, wing 212, tail 84, tarsus 14. 



Adult female. Similar to the adult male^ but slightly smaller. 

 Wino- 205 mm. 



Breeding-season. Unknown in British Guiana. 



JSest. Unrecorded in British Guiana. 



J'^ggs. Undescribed from British Guiana. 



liange in British Guiana. Great Falls, Demerara River, Su[)e- 

 naam Biver, Bartica, Abary Biver {McConnell collection) ; Takutu 

 River, Bartica ( Whitelg). 



Kxtralimital liange. Trinidad, North-west Brazil. 



Habits. Unrecorded in British Guiana. 



Genus HYDROPSALIS Wagl. 

 Hi/droj^salin AVagler, Isi.s, 1832, p. 1222. Type ll.furcifer (Vieill.). 



This genus is characterized by having the outermost and middle 

 pairs of tail-feathers the longest and those next to the cential ones 

 the shortest. 



237. Hydropsalis scliomburg'ki. 

 (Plate yil.) 



Hydropsalis schomhurgkl Sckter, P. Z. 8. 18GG, p. 146 (British 



Guiana); Salvin, Ibis, 1885, p. 439 (Camacusa) ; Hartert, Cat. B. 



Brit. Mus. xvi. p. 601, 1892 (Briti.sh Guiana) ; Brabourne A Chubb, 



B. S. Amer. i. p. 100, no. 946, 1912. 

 Hydropsalis furcifer (nee Vieill.), Cab. in Seliomb. Keis. (iuian. iii. 



p. 710, 1848. 



Adult nude. General colour above blackish brown .reckled and 

 mottled Mith grey, spotted with white and buft' on the wings, 

 and fringed with buff and white on the scapulars; the three outer 



