284 
Psyche 
[December 
of normal type, forming two flat lobes of more or less triangular 
shape and provided with numerous chitinous setae; last segment 
produced into two small, un jointed processes. 
Length of body : c? 1.7 mm; 9 2.5 mm. (Fig. 1, f). 
Eggs: Oval, whitish, with a series of faint transverse ridges 
on the upper half, the top set off as a distinct micropyle field with 
numerous small protruding tuber cules in a row. 
This remarkable form of louse which offers in its external 
general appearance a striking resemblance to the mallophagan 
Fig. 1. Hamophthirius galeopitheci n. sp. A, head; B, tarsal claw; C, pleural sclerite; D, ab- 
domen; E, genital rods of male; F, egg. 
genus Trichophilopterus Stobbe in possessing strong chitinous 
hooks on the head and antennae, was taken by me near Fesseltan 
in British North Borneo on a freshly shot Galeopithecus sp. Like 
its host it occupies a very isolated position and it is difficult to 
place it even in one of the known families. The mouthparts are 
very delicate but mainly of the same type as in other Anoplura. 
The three-jointed antennae and the strongly developed chitinous 
hooks as well as the general shape of the head point to a high 
degree of specialization. 
