124 Proceed i II (js of fndidiut Acadennj of Sicience. 



DD. Temporal margins usually angulatcd; last segment of 

 abdomen convex, rarely angularly emai-ginated with Uxo 

 points. 



E. First segment of antenna of male large, sometimes with 

 an appendage; third segment always with an appen- 

 dage. Goniodes N. 

 EE. First segment of antenna of male enlarged but 

 always without appendage; third segment without 

 appendage; last segment of abdomen always rounded 

 behind. ' Gonioeotes N. 

 C(\ Species elongate, narrow, sides sub-parallel. 

 D. Third segment of antenna of male without an appendage. 



Ornithobius Denny. 

 DD. Third segment of antenna of male with an appendage. 

 E. Front deeply angularly notched. 

 EE. Front not angularly notched. 



F. Antennae and legs long; a semicircular oral fossa. 



LipeurusN. 

 FF. Antennae and legs short; oral fossa narrow, 

 elongate, extending as a furrow to the anterior 

 Margin of the head. 



Onocophorus Rudow. 



Key to the Gerera of the Suborder Amhlycera. 



A. Tarsi with 1 claw; infesting mammals (family Gryopidae). 

 A A. Tarsi with 2 claws; infesting birds (except Boopia?) 



(family Liotlieidae) 



B. Ocular emargination distinct, more or less deep. 



C. Forehead rounded, without lateral swelling; antennae projecting 

 beyond border of the head. Colpocephalum. N. 



CC. Forehead with strong lateral swellings. 



D. Antennae projecting beyond border of the head; temporal 

 angles projecting rectangularly; eye large and simple. 



Boopia P. 

 DD. Antennae concealed in groove on under side of liead; 

 temporal angles rounded, or slightly angular; eye divided 

 by an emargination and fleck. 

 E. Mesothorax separated from metathorax by a suture. 



Trinoton N. 

 EE. Meso- and metathorax fused; no suture. 



Laemobothrium N. 

 BB. Ocular emargination absent or very slight. 



C. Sides of the head straight or slightly concave, with tw^o small 

 laterally-projecting labral lobes. Physostomum N. 



CC. Sides of the head sinous; forehead without labral lobes. 

 D. Body very broad; metathorax shorter than prothorax. 



p]ureum N. 

 D. Body very broad; metathorax shorter than prothorax. 



Eureum N. 



