18 BRUCE F. CUMMINGS — NONDESCRIPT ANOPLURA AND MALLOPHAGA. 



slender diagnoses of the original authors. Giebel misquotes Ehrenberg and then 

 suggests that Pallas's species, according to his figure, has quite the appearance 

 of the swine louse (H. urius). Piaget (Les Pediculines, 1880, p. 656) copies the 

 suggestion, which is clearly an error, if for no other reason than the much smaller 

 size of Pallas's parasite. 



As the description by Pallas is inadequate, a further account is appended. 

 Unfortunately I have no specimens from the Syrian animal for comparison, but 

 assuming that they belong to another species, the specific name leptoccplialus must 

 be given to them, while the name caviae-capensis may be retained for Pallas's 



Fig. 2. — Linognathus caciae-capeusis (Pallas), $, and the underside of the last segments (£)• 



insect, although, strictly speaking, he used no name at all, but published 

 descriptions of two animals, a Taenia and the Pedieulus, under the Latin title 

 (not name) of " Pediculus et Taenia Caviae capensis." 



Head long, narrow, quadrilateral in cross-section, with four sharp edges ; 

 sucking apparatus correspondingly elongate. Preantennal area conical with 2 

 deep brown taches on each side, which curve in across the head towards each 

 other at about the level of the antennae, On the dorsal surface behind the 

 antennae, two longitudinal rows of hairs, the last one in each row being very 

 long ; two hairs on each side at the base of the antennae ; two more a little 

 further forward nearer the middle line ; still further in front, another row of only 

 six hairs, the two outside ones being on the extreme margin ; two hairs at the top 

 of the proboscis. On the ventral surface, two hairs in front of the antennae and 



