260 BIRDS OF BRITISH GUIANA. 



Nest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Ireng River, Mazaruni River, Ituri- 

 bisi River, Supenaam River, Bartica, Bonasika River, Makauria 

 River, Abary River, Arwye River, Arawai River, Tiger Creek 

 (McConnell collection) ; Mount Roraima, Merume Mountains, 

 Kamakusa, Bartica ( Whitely) . 



Extralimital Range. Cayenne (Linne). 



Habits. Unrecorded in British Guiana. 



Genus CHIROMACH^RIS Cab. 



CMromacTiaris Cabanis, Arcbiv fiir Naturg. xiii. pt. i. p. 235, 1847. 

 Type G: manacus (Linn.). 



rig. 106. — To show the narrow and curved primaries. 



The chief character in this genus is the wing formula. The 

 bill is short and very slightly hooked at the tip, the width at the 

 base being about three-fourths the length of the exposed culmen. 

 The wing is rounded, the primary-quills very narrow and bent 

 inwards, the fifth primary longest, the second, third, fourth, and 

 sixth subequal, and the first rather shorter than the seventh. 

 The tail is square at the tip and about half the length of the wing. 

 The tarsus is about two-thirds the length of the tail, and the hind 

 toe and claw almost equal in length to the middle toe and claw. 

 Coloration : male entirely difi^erent to the female. 



