576 BIRDS OK BRITISH GUIANA. 



to about one-li:ilE the lengih of tlie expo«-e(J culiiien, tlie nostrils 

 are exposed, and the eulmen is not flattened. The winu- is rounded, 

 the third, fourth, and fifth primaries longest and ecjual, the second 

 about equal in length to the sixth, and the first about e(jual to the 

 ninth. The tail is rounded at the tip, the outer feather on each side 

 being about one-fourth shorter than the middle ones. The tarsus 

 exceeds the length of the exposed eulmen by about one-third, and 

 the hind toe and claw are about equal in length to the middle toe 

 and claw. (Joloration : male and female Bimilar, but the latter 

 less bright. 



710. Icterus xantlLornus. 

 Yellow Oriole. 



Oriohis xanthonius Gmel. Syst. Xat. i. p. ;^i)l, 1788 (Venezuela). 

 Icterus xanthornus Cab. in Schomb. Keis. Gnian. iii. p. 680, 1848; 



Sclater, Cat. B. Brit. Mus. xi. p. 380. 1886 (Georj^etown) ; Lloyd 



Price, Timehri (2) v. p. 02, 1891 ( nesting habits) ; (^uelch, torn. cit. 



p. 86 (Georgetownj ; Brabourne «?c Chubb, B. S. Amev. i. p. 489, 



no. 4516, 1912. 

 Icterus xanthonius xanthonius Beebe, Tropical Wild Life in British 



Guiana, p. 137, 1917 (Bartica^ 



"Common Yellow Haiig-nest or Plaiiitain-ldrd " (Qiielrh). 



Adult lU'de. General colour above and below yellow, including 

 the top of the head, sides of face, entire bafk, upper tail-coverts, 

 lesser upper wing-coverts, sides of neck, ijreast, abdomen, sides of 

 body, under tail-coverts, and under wing-coverts ; wings and tail 

 black ; margins of inner secondaries and tips of niajor-coverts 

 white ; lores and short feathers round the eye black, like the chin, 

 throat, and fore-neck ; under surface of flight-quills dark brown 

 with whitish margins ; loaer aspect of tail black, slightly edged 

 with white at the tip. 



Total length 192 nun., exposed eulmen 17, wing 93, tail d."3, 

 tarsus 25. 



The sjjecimen described was collected on the Abary River. 



Adult female. Similar to the adult male but tlie coloration less 

 bright. Wing 81 mm. 



The female described was collected by the late Hetiry 

 Whitely at Quonga, November 18^7, now in the British Museunj, 

 Salvin-Godman collection. 



Breeding-season. Unknown in British Guiana. 



