GYMXOMYSTAX. — ICTERUS. 575 



709. Gymnomystax mexicanus. 

 Black-and-yellow Oriole. 



Orioli/s mexicanus Linn. Syst. Xat. i. p. 1G2, 1766 (Cayenne). 

 Gymnnini/stax melanictcrus Scliiter, Cat. B. Erit. Mus. xi. p. 362, 1SS6 



(Demerara). 

 Gi/mnomifstax mexicanus Braboiu-ne & Cliiibb, B. S. Ainer. i. p. -137, 



no. 4oUU, 1912. 



Adult m<ile. Crown of lieaJ, sides o£ f;iee, throat-, and neck all 

 round bright yellow^ like the breast, al)doinen, sides of body, 

 thighs, under tail-coverts, lesser U])]")er and under Aving-coverts; 

 remainder of the wings, entire back, and tail black. 



Total length 200 niui., exposed cnlnien 31, ^ving 132, tail IIG, 

 tarsus 34, middle toe and claw 3-4. 



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

 culmen '2^ mm., wing 123. 



This species is not represented in tlie ^IcConnell collection, and 

 the specimens described are in the British Museum. 



Breeding-season. TJnknown in British Guiana. 



uS^est. Unrecorded in British Guiana. 



Egas. Undescribed from British Guiana. 



Hawje in British Guiana. Demerara [British Museum) . 



Extralimital Range. Venezuela, North Brazil, rem. 



llahils. Unrecorded in British Guiana. 



Genus ICTERUS Briss. 



Icterus Brisson, Ornith. ii. p. S5, 1760. Type I. vulgaris Daud. 



Fig. 209. — Icterus xanthnnius. 



In this genus the region of tlie oye is feathered. The bill is of 

 medium length and sharply |)uinted, its width at the base is equal 



