osTiNOPSi 549 



its frontal shield at the base oE the forehead. Thfe head is crested. 

 The wing is rounded, the second, third, and fourth primaries 

 longest and equal, the first is intermediate in- length between 

 the fifth and sixth. The tail is rounded at the tip and graduated, 

 and about nine-tenths the length of the wing. The tarsus is 

 about two-thirds the length of the culmen, including the frontal 

 shield. Coloration : male and female similar. 



Key to the Species. 



A . General colom- of pi umage black ,. O. decumanus, p. 549. 



B. Grfeneral colour of plumage bronze-green O. viridig, p.- 552. 



697. Ostinops decumanus. 



Great Oeestbd Cacique. * 



^anthornus decumanus Pallas, Spic. Zool. fasc. vi. p. 1,1769 (Surinam). 



Cassicus cristatus Cab. in Schomb. Eeis. Guian. iii. p. 680, 1848. 



Ostinops decumanus Salvin, Ibis, 1885, p. 217 (Bartica Grove); Sclater, 

 Cat. B. Brit. Mus. xi. p. 315, 1886 (Bartica Grove) ; Quelch, 

 Timehri (2) iv. p. 102, 1890 (Great Falls), op. cit. v. p. 85, 1891 

 (Georgetown) ; Lloyd Price, tom^ cit. p. 62 (nests and eggs) ; 

 C. A. Llovd, op. cit. xi. p. 5, 1897 (nesting habits) ; Brabourne & 

 Chubb, B". S. Amer. i. p. 432, no. 4445, 1912. 



Ostinops decumanus decumanus Beebe, Tropical Wild Life in British. 

 Guiana, p. 137, 1917 (Bartica). 



"Large Yellow-tailed Black Bunyas " [Quelch). 



Adult male. General colour both on the upper and under 

 surface glossy black, including the head, upper back, wings, and 

 middle tail-feathers, on the upper parts, sides of face, throat, 

 • breast, sides of body, abdomen, thighs, under wing-coverts, and 

 quill-lining, on the under surface ; lower back, rump, upper and 

 under tail-coverts dark chestnut ; tail bright yellow. " Bill 

 white ; feet black" (Cat. B. Brit. Mus.). 



Total length 4.65 mm., culmen (including the frontal shield) 69, 

 wing 247, tail.200, tarsus 48. 



The specimen described was collected on the Ituribisi River in 

 October 1908. 



Adult female. .Similar to the adult male, and differs only in 

 , having a shorter crest and smaller measurements. 



Total length 345 mm., exposed culmen 55, wing 178, tail 149, 

 tarsus 45. 



The female of this species is not represented in the McConnell 



