THAL URANIA. rETASOPHuKA. 40.') 



Trochilus furcatus (nee Gmel.), Cab. in Sehomb. Keis. Guian. iii. 



p. 708, 1848. 

 Thalurania furcata (nee Gmel.), Salvin, Ibis, 1885, p. 433 (Bartica 



Grove, Camaeusa, Merume Mts., Eoraima) ; id. Cat. B. Brit. Mus. 



xvi. p. 84, 1892 (Demerara). 



Adult tnale. General colour above dark green ; tail steel-blue ; 

 fliglit-feulhers brown ; interscapulum purple ; throat and sides of 

 neck bright glittering green ; abdomen glittering purple ; under 

 wing-coverts green ; thighs white. 



Total length 108 mm., culmen 16^ wing 53, tail 43. 



Adult female. Differs from the adult male in being green above, 

 greyish wliite below, and white tips to the tail-feathers. 



The male and female described were collected on the Bonasika 

 River. 



Breeding-season, Unknown in British Guiana. 



Nest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana, Mount Roraima, Ituribisi River, 

 Supenaam River, Bartica, Bonasika River, Makauria River, 

 Mazaruni River, Arwye River, Great Falls Demerara River 

 {McConnell collection), 



Kxtralimital Range. Venezuela. 



Habits. According to Schomburgk (Reis. Guian. iii. p. 708) 

 this species is fairly common in British Guiana and is genei'ally 

 found on the outskirts of woods, where it frequents the flowering 

 Musaceen. Schomburok did not find its nest. 



Genus PETASOPHORA Gray. 



Petasophora Gray, List Gen. B. p. 13, 1840. Tvpe P. serrirostris 

 (Vieill.). 



The chief characters by which this genus is distinguished are 

 the feathered base of the bill, the feathered nasal covers, except 

 on their lower edges, the serrations on the up[)er mandible, and 

 the emarginated tail. 



Key to the S/>eciys. 



A. General colour f^reon ; larger wing more tlian 



80 mm. ; hill more than 20 mm P. f]er»i(iua, \k !()(>. 



li. General colour rufous-ltrown ; smaller \vin<; 



less than 80 mm. ; hill less than 20 mm. ... /'. itd i>hina', y. 107. 



