TACHYPIIONUS. — EUCOMETTS. 537 



JS^esf. Unrocorded, 



E(jgs. Undescribed. 



Ihinfje confined to IJrkish Guiana. Itnri])isi Rivor, Snponanm 

 River, Anavica River, Arawai River, Groat Falls Denierara 

 River (^McConnell collection); Mcniine Mountains, Kamarano- 

 River, Bartica ( WJiitelj/). 



Habits. According to Schombnrnk (Reis. Guian. iii. p. (^)(j^) 

 this spc'cit'S is also more common near the coast than inland. 

 Single individuals were observed by him among the flocks of 

 FringilVulcr, Tam/arida?, Tyrannida:, and Ccp.rehidif that traverse 

 the woods and plantations in search of insect food. This cnetom 

 took place morning and afternoon of each day, the birds following 

 in the same direction on each occasion. 



Genus EUCOMETIS Scl. 

 Eacomelis Sclater, P. Z. S. 1856, p. 117. Type IE. penicillala (8pix). 



d 



p,'- 



Fig. 194. — Eucometis penicillata. 



This genus is easily distinguished by the well-developed crest, 

 wliich covers the top of the head and nape. The rictal bristles are 

 numerous but short. The bill is somewhat short and stout, tho 

 width at <he base being more than half the length of the exposed 

 culmcn; the tip of the up[)er mandible is slightly hooked, but there 

 is no tooth on its cutting edges. The wing is rounded, the second, 

 tliird, fourth, and iifih j)rimaries longest and subequal, and tho 

 first is intermediate in length between the sixth and sevenlh. 

 The tail is rounded at the tip and almost as long as the wirifr. The 

 tarsus is nearly a third longer than the exposed culmen, which is 

 about e(iual in length to tho middle toe and claw. Coloration : 

 male and female alike in ])Iumago, but the femah; is smaller in 

 winu-njeasurenu'nt. 



