378 PSYCHE. [May 1896. 



DD Temporal margins usually angul.ited ; last segment of abdomen 

 convex, raiely angularly emarginated with two points. 

 E First segment of antenna of male large, sometimes with an appen- 

 dage ; third segment always with an appendage. 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. . Goniocotes Buriii. 

 CC Species elongate, narrow, sides sub-parallel. 



D Third segment of antenna of male without an appendage. 



Oritithobitis De7iny. 

 DD Third segment of antenna of male with an appendage. 



E Front deeply angularly notched. . . Bothriometopits Tasc/i. 



EE Front not angularly notched. 



F Antennae and legs long ; a semi-circular oral fossa. Lipeicrus N- 

 FF Antennae and legs short ; oral fossa narrow, elongate, extend- 

 ing as a fiu'row to the anterior margin of head. 



Oncop/ioriis Rudozv. 



Key to the Genera of tJie Sub-order Amblycera. 



A Tarsi with one claw; infesting mammals (family Gyropidae) Gyropiis N. 

 AA Tarsi with two claws; infesting birds (except Hoopi'a^) (family 

 Liotheidae). 

 B Ocular emargination distinct, more or less deep. 



C Forehead rounded without lateral swellings; antennae projecting 

 beyond border of the head. . . . Colpocephalutn 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 or under side of head ; temporal 

 angles rounded or slightly angular ; eye divided by an emargi- 

 nation 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 ; forehead with two small 

 laterally-projecting labral lobes. . . Pliysostovium N. 



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



D Body very broad ; metathorax shorter than prothorax. Eureum N. 

 DD Body elongate ; prothorax shoi ter than metathorax. 



