May i8q<),] 



PSrCHE. 



■in 



Family Philopteridae. 



Genera Akidoproctus Piaget, Do- 

 cophoius Nitzsch, Giehelia Kellogg 

 (MS.)^ Nirmus Nitzsch, Eurymetopus 

 Taschenberg, Goniodes Nitzsch, Goni- 

 ocotes Burmeister, Oniithobius Denny, 

 Bothriometopus Taschenberg, Lipeurus 

 Nitzsch, Oncophorus Rudow. 

 Sub-order Ambi.ycera. 



Family Gyropidae. 



Genus Gyropus Nitzsch. 

 Family Liothcidae. 



Genera Colpocephalum Nitzsch, 

 Boopia Piaget, Trinoton "Nitzsch, 

 Laemobothriiun Nitzsch, Physosto- 

 mum Nitzsch, Eureum Nitzsch, Nitz- 

 schia Denny, Ancistrona Westwood, 

 Menopon Nitzsch. 



Key to the Sub-orders. 



A With filiform 3- or 5-seginented antennae, and no labial palpi. 



Sub-order Ischxocera. 



AA With clavate (or capitate) 4-segmente(l ;intciinae, and 4-segmented labial 



palpi. ...... Sub-order Ambi.ycera. 



Key to the Genera of tJie Sub-order licJinocera. 



A With 3-segmented antennae ; tarsi with i claw ; infesting mammals ( family 

 Trichodectidae) . ..... Trichodectes N. 



AA With 5-segmented antennae; tarsi with ;: claws; infesting birds (famil)' 

 Philopteridae). 

 B Antennae similar in both sexes. 



C Front deeply angularly notched. . . . Akidoprocttis P. 



CC Front convex, truncate, or rarelv with a curving emargination, but 



never angularly notched. 



D Species broad and short ; with large movable trabeculae (at the anterior 



angle of antennary fossa). 



E Forehead with a broad transverse membranous flap projecting beyond 



lateral margin of the head in tlie male, barely projecting in female. 



Giebelta Kell. 

 EE WithoLit such membranous flap. . . . Docophoriis A'. 



DD Species elongate, narrow ; with very small or no trabeculae. 



Nirmus AL 

 BB Antennae differing in the two sexes. 



C Species wide, with the body elongate-ovate to sub-orbicular. 



D Temporal margins rounded ; last segment of abdomem roundly emar- 

 ginated ; antennae of male without appendage, third segment very 

 long. ...... Eurymetopus Tciseh.. 



