BRUCE F. CUMMINGS— NONDESCRIPT ANOPLURA AND MALLOPHAGA. 37 



ventral surface they are united by a transverse band. The head is wider 

 behind the antennae and narrows again towards the thorax, which is V-shaped to 

 receive it. On the upper surface, two longitudinal rows of hairs, meeting behind. 

 A single hair in the lateral margin midway between antenna and thorax ; between 

 the antennae, near the middle line, two small hairs ; more anteriorly, between the 

 lateral taches, another pair of small hairs. Under surface almost bare, except 

 for two long bristles inside the lateral margins, behind the antennae, and two 

 more in front, closer together. Antennae long and thick, second segment a little 

 longer than the first, and a sense-organ on the fourth and the fifth. Thorax broad 

 and short, with two long hairs on the upper surface near the middle ; spiracles 

 large, with three small hairs on the inner side of each of them ; a short bristle at 

 each anterior corner. First pair of legs slender, with a long pointed claw ; hinder 

 pairs larger, with broad, permanently curved, prehensile claws. Abdomen plump, 

 broad, longer than head and thorax together. The third segment as in L* 

 breviceps, Piaget, and others, with a long hair on each side, and a minute one at 

 the base of each long one. Segments VI and VII at their lower angles carry 

 on each side two long bristles, one dorsal and one ventral ; rows of hairs running 

 transversely, but confined to the median areas, are found on both dorsal and 

 ventral surfaces. In the c? the last segment on the upper surface has a large 

 semicircular row of hairs ; genital armature large and projecting on a terminal 

 papilla. In the Q the gonopods are large and thickly bristled, with a transverse 

 row of hairs running between them. The sides of the last segment are formed 

 into two distinct ventro-lateral, strongly chitinised pieces, each with a thick 

 exterior margin bearing a row of long bristles. An elongate genital tache 

 between the gonopods and extending some way beyond them behind, in shape 

 like a slipper (crepiduloid), with two stout bristles, one on each side of it in front, 

 and between these two short longitudinal rows of small hairs. 



Length (in mm.), d\ 1*475, Q, 2*125; head, cf, 0*3, Q, 0*325; thorax, 

 d\ 0*175, Q, 0*2 ; abdomen, d\ POO, Q, 1*6 ; greatest width, S, 0*475, Q, 0*8. 



Host : Limnotragus gratus, Sel. (in the Zoological Gardens, Regents Park). 



Congo. 



Linognathus caviae-capensis (Pallas) (%s. 2 and 3). 



Pallas, in his Spicilegia Zoologica, Fasciculus II (Mammalia), 1767, describes 

 and figures, as Pediculus caviae capensls, a parasite from the. Cape Ilyrax 

 (Procavla capensis), probably identical with specimens of Anoplura from the 

 same mammal in the collection of the British Museum. His description and his 

 figures agree with the species described below in the sexual dimorphism, in the 

 contour of the head, and in the long hairs on the abdomen. 



Ehrenberg (Symbolae Physicae, 1828, Decas Prima, page ' f ') gives the 

 following brief diagnosis of a species, Pediculus leptoccphalus, from the Syrian 

 Hyrax (P. syrlacus), which he regards as differing from Pallas's insect: — 

 " Capite antennaruin porrectarum articulis duobus superato gracili, oculis 

 distinctis nullis." From this it appears probable that the species on the Syrian 

 Hyrax is distinct. 



Giebel (Insecta Epizoa, 1874, p. 47) unites the two forms under the name 

 Haematopinus leptocephalus, though he remarks upon Ehrenberg's opinion as to 

 their distinctness and though he had apparently nothing to go upon except the 



