1925] 
A New Genus of Sucking Lice 
283 
A NEW GENUS OF SUCKING LICE, 
By Eric Mjoberg 
Hamophthirius n. g. 
Antennae three-jointed, first joint very strongly developed, 
with a large chitinous hook; head anteriorly very strongly cons- 
tricted, with a strong and sharp chitinous hook on each side, 
posterior half transverse, nearly twice as broad, posterior angles 
protruding, forming two processes, posterior margin strongly 
emarginate on each side of the middle; thoracic segments coal- 
escent, parallel-sided, all pairs of legs fairly equally developed; 
abdomen of normal type, with pleural scelerites developed on 
segments two to six. Integument scaly. 
Type, the following species: 
Hamophthirius galeopitheci n. sp. (Fig. 1.) 
Yellowish, depressed; head in front strongly chitinized; 
lateral hooks parallel, very sharp; antennae with the first joint 
enormously developed, with a very large hook and ventrall yon 
the posterior margin with a smaller one; second joint shorter 
than the third, both nearly parallel-sided; third joint with two 
lateral sensitive fossae, its terminal field with eight to ten sem- 
sitive seta-like organs. On the ventral side of the head posteriorly 
there is a dagger-like spine at each side; posterior lower angles 
obtuse, the upper angles distinctly produced, rounded at the 
tips, and provided with three long setae. Thoracic segments 
coalescent, anterior angles of prothorax rounded; at the middle 
of the anterior margin deeply excised to receive the corresponding 
protruding part of the occipital region of the head; legs moderate 
in size, fairly equally strongly developed; tibiae with four small 
terminal chitinous spines opposite to the claw; claws large, dis- 
tinctly striated (fig. 1, b). Abdomen in both sexes of normal 
development; pleural scelerites small, posteriorly emarginate 
(fig. 1, c and d); tergites and sternites with two more or less 
regular rows of fine depressed setae. Chitinous parts of genitalia 
in c? (fig. 1, e) forming two parallel jointed rods, simple gonapods 
