124 On new South Americ.n Birds, 



POLIOL.EMA, gen. nov. 



Tliis form is readily distiiiguislied in Iraving the throat 

 nniform with the rest of the under surface. The bill, which 

 is long compared with the other genera of this group, has the 

 exposed culint-n about equal in length to the hind toe and 

 claw. The wing is rounded, the third, fourth, and fiffh quills 

 longest, the second jibout equal to the seventh. The tail 

 is short and nearly square, the outer feather on each side is 

 only very slightly shorter than the rest. The feet are small 

 and weak. The male and female are eiitircly different in 

 colour. I propose, therefore, that this form be separated 

 generically under the name of Poliohema. 



Type, MyrviotheruTa cinereiventris, Sclater & Salvin. 



BiCHROPOGON, gen, nov. 



The species which I propose to separate generically have 

 hitherto i>een associated with Ihjpocnemis of Cabanis, but 

 it differs altogether in colour as well as in its projiortionate 

 measurements. The bill is small and narrow. The wing, 

 which is slightly pointed, has the third, fourth, fifth, and 

 sixth |)rimaries longest, the second about equal to the eighth. 

 The tail, which is nearly square at the tip, is about two-thirds 

 the length of the wing. The legs and feet are proportion- 

 ately strong, the tarsus exceeds the length of tlie exposed 

 culmen by about two-fifths. Male and female quite different 

 in colour of j)lumage. 



This genu* is based on Fli/pocnemis pacilonola, Cabanis. 



Jihopixif fuh'iventi is salmo7iij subsj). n. 



Adult male. Differs from the adult male of I?, f. fidvi- 

 Vfintris (Lawr.) in being uniform olive on the top of the head, 

 back, and sides of face, instead of greyish brown ; upper 

 wing-coverts pale brown, not blackish ; tiiil paler; the white 

 on the throat more extensive; brea&t buff instead of slate- 

 grev ; abdomen and under tail-coverts ))aler and inclining to 

 buff; under surface of quills pale brown, not blackish brown. 



Total length 110 nun.; exposed culmen 12; wing 50; 

 tail 37; tarsus 17. 



Adult female. Differs from the adult female of n.f.fulvi- 

 rentris in being paler hoth on the upper and utider surface, 

 Wing 50 mm. 



Hab. Colombia and Ecuador. 



The type, which is in the British Museum, was collected 

 hy T. K. Salmon at Remedios, Northern Colombia. 



