146 BIRDS OF BRITISH GUIANA. 



o£ quills pale brown with whitish inner edgings ; lower aspect of 

 tail pale brown. " Bill blackish ; feet whitish" (Oat. B. Brit. Mus.). 



Total length 92 mm., exposed culmen 10, width of bill 10, 

 wing 59j tail 30, tarsus 17. 



The description is taken from an example collected on the 

 Bonasika River in 1911. 



Adult female. Similar in respect of plumage to the adult male 

 but the coronal patch not so conspicuous. Wing 59 mm. The 

 female was collected at Bartica. 



Young in first plumage. Smoke-brown above, including the 

 head, back, and upper wing-coverts with pale tips to the feathers ; 

 the breast similar but paler;' abdomen sulphur-yellow. Wing 

 51 mm. This specimen was collected at Bartica in 1912. 



There are four other individuals, each from a different locality, 

 which show no- trace of the coronal patch and have a wing- 

 measurement of 54 mm. These I presume to be immature birds 

 and, if so, the coronal mark would be the first sign of the approach 

 to maturity. 



Breeding-season. Unknown in British Guiana. 



Nest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Ituribisi River, Bartica, Kamakabia 

 River, Bonasika River, Makauria River, Abary River, Anarica 

 River (McConnell collection). 



Eactralimital Range. Surinam (Penard), North-east Brazil, 



Habits. Unrecorded in British Guiana. 



444. Placostomus gumia. 



Surinam Golden-crowned Flat-bill. 



Flatyrhynchus superciliaris (necLawr.) Salvin, Ibis, 1885, p. 292 (Bar- 

 tica Grove) ; Sclater, Cat. B. Brit. Mus. xiv. p. 68, 1888 (Bartica 

 Grove). 



Flatyrhynohus coronatus (nee Scl.) Brabourne & Chubb, B. S. Amer. i. 

 p. 270, no 2752 (part), 1912. 



Placostomus coronatus gumia Bangs & Penard, Bull. Mus. Comp. Zool. 

 Harvard Coll. kii. no. 2, p. 74, 1918. 



Adult male. Upper surface including the back, wings, and tail 

 dark olive-green inclining to brown on the flight-quills and tail- 

 feathers ; primary-coverts and inner webs of primary and second- 

 ary quills dark brown with pale edges to the latter ; middle of 

 crown yellow skirted on each side with chestnut ; base of fore- 



