MALLOPHAGA 



337 



chapter in Professor Herbert Osbom's "Insects Affecting Domestic 

 Animals" (Osborn '96). 



The chief divisions of the order adopted by Kellogg ('08 b) are as 

 follows. 



A. With filiform, 3- or 5-segmented, exposed antennae; no maxillary palpi; 



mandibles vertical Suborder Ischnocera 



B. With 3-segmented antennae; tarsi with one claw; infesting mammals. 



Family Trichodectid/e 



BB. With 5-segmented antennae; tarsi with two claws; infesting birds 



., Family Philopterid^ 



AA. With clavate or capitate, 4-segmented, concealed antennae ; with 4-segmented 



maxillary palpi; mandibles horizontal Suborder Amblycera 



B. Tarsi with one claw; infesting mammals Family GYROPiDiE 



BB. Tarsi with two claws; infesting birds, excepting a few species that infest 

 kangaroos, wallabies, and wombats Family Liotheio.^ 



