' GYMNOMYSTAX. — ICTERUS. 575 



709. Gymnomystax mexicanus, 



Black-and-yellow Oeiole. 



Oriolus mexicanus Linn. Syst. Nat. i. p. 162, 1766 (Ca^'enne). 

 Oymnomystax melan icterus Sclater, Cat. B. Brit. Mus. xi. p. 362, 1886 



(Demerara). 

 Gymnomystax. mexicanus Brabourne & Chubb, B. S. Amer. i. p. 437, 



no. 4600, 1912. 



Adult male. Crown of head, sides of face, throat, and neck all 

 round briobt yelloWj like the breast, abdomen, sides of body, 

 thighs, under tail-coverts, lesser upper and under wing-coverts; 

 remainder of the wing^, entire back, and tail black. 



Total length 260 mm., exposed culmen 31, wing 132, tail 116, 

 tarsus 34, middle toe and claw 34. 



Adult female. Similar to the adult male but smaller. Exposed 

 culmen 28 mm., wing 123. 



This species is not represented in the McConnell collection, and 

 the specimens described are in the British Museum. 



Breeding-season. TJnknown in British Guiana. 



'Nest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Demerara [British Museum). 



Extralimital Range. Venezuela, North Brazil, Peru. 



IJabits. Unrecorded in British Guiana. 



Genus ICTERUS Briss. 

 Icterus Brisson, Ornith. ii. p. 85, 1760. Type I. vulgaris Daud. 



Fig, 209. — Icterus xanthornus. 



In this genus the region of the eye is feathered. The bill is of 

 medium length and sharply pointed, its width at the base is equal 



