Eric Mjöberg.
A New Genus of Sucking Lice.
Psyche 32:283-284, 1925.

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19251 A New Genus of Sucking Lice 283
A NEW GENUS OF SUCKING LICE,
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 ventral1 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 sen- 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 setse. 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; tibiee with four small terminal chitinous spines opposite t,o 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 d" (fig. 1, e) forming two parallel jointed rods, simple gonapods Ps\rht 32:2M-284 (195). http:ffpsyche cnlclub cafl2/32-283 html



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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, unjointed processes. Lengthof body: cfl.7mm; Q2.5mm. (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 tubercules in a row. This remarkable form of louse which offers in its external general appearance a striking resemblance to the mallophagan Fig. 1.
Hamophthirius galeobitheci 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.




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