PACHYRHAMPHUS.-^LATHEIA. 277 



This series of four young birds was collected on the Mazaruni 

 and Bonasika Rivers. 



Breeding-season. Unknown in British Guiana. 



West. Unrecorded in British Guiana, 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Ituribisi River, Supenaam River, 

 Mazaruni River, Bartiea, Bonasika River, Makauria River, 

 Arawai River, Great Falls Demerara River, Arwye Creek 

 {McConnell collection') ; Merume Mountains, Kamakusa, Bartiea 

 ( WMtely) ; Georgetown {Beebe). 



Extralimital Range. Surinam (Merreni), Venezuela, Eucador, 

 East Peru. 



Habits. Unrecorded in British Guiana. 



Genus LATHRIA Swains, 

 Lathria Swainson, Classif. B. ii. p. 255, 18.S7. Type X. cinerea (VieilL). 



Fig. 110. — JLatJiria cinerea. 



The members of this genus are birds of rather large size with 

 proportionately small feet. The bill, which is keeled and sharply 

 hooked at the tip of the upper mandible, is wide and depressed at 

 the base, where the width is about two-thirds the length of the 

 exposed culmen. The rictal bristles are moderately developed. 

 The wing is rounded, the third, fourth, and fifth primaries longest 

 and equal, the second about equal in length to the sixth, and the 

 first about equal to the seventh. The tail is almost square at 

 the tip and about ten-twelfths the length of the wing. The tarsus 

 is about equal to the middle toe and claw in length. Colo- 

 ration : male and female similar. 



