DESCRIPTIONS AND DETERMINATIONS OF SPECIES 1 5 



oval, rather slender. First segment very narrow, with two short hairs. 

 Second segment with two plates, each with four hairs. Third and eighth 

 segments each with one plate and one row of six hairs. Fourth to sev- 

 enth segments each with two plates and two rows of six hairs. Ninth 

 segment with four hairs, the inner pair very short. Pleurites of the first 

 segment apparently lacking, those of the second to seventh segments with 

 a short tooth at each posterior angle and with two short spines on the 

 posterior margin. Pleurites of the eighth segment not toothed and with 

 the hairs longer than on the other segments. 



On the ventral side the arrangement of the plates and hairs is prac- 

 tically as on the dorsum except that the first segment is apparently lack- 

 ing and that the third segment has two plates. Genital plate pointed pos- 

 teriorly and with a group of four short spines near the posterior margin. 

 Gonapods with one long stout hair and two short ones. Behind the gona- 

 pods a group of four rather slender hairs, and at the posterior angles of 

 the ninth segment a stout, inwardly projecting spine with three or four 

 slender hairs and two stout hairs just outside it. Anterior lip of the vul- 

 va deeply fringed. 



Description of the Male. — Length .92 mm., length of head .2 mm., 

 length of abdomen .62 mm., width of head .14 mm., width of thorax .24 

 mm., width of abdomen .35 mm. Head, thorax and legs as in the female. 

 Third antennal segment with the distal pre-axial angle prolonged into a 

 pronounced projection. First segment of the abdomen with two hairs, 

 second with two rows of hairs, the first of four, the second of eight. 

 Third to seventh segments each with one row of six to eight hairs. On 

 the ventral side the first, second and third segments each with two plates 

 and two rows of hairs, remaining segments with one plate and one row 

 of hairs. Posterior end of the abdomen pointed. Having but a single 

 male we have been unable to work out the genitalia. 



Genus HOPLOPLEURA Enderlein. 



Hoplopleura Enderlein, Zool. Anz., vol. 28, pp. 221-223, ( I 904)- 

 Haematopinus (Polyplax) Neumann, Archiv. de Parasit, vol. 13, p. 531, (1909). 

 Hoplopleura Mjoberg, Arkiv. for Zool., vol. 6, no. 13, p. 164, (1910). 

 Hoplopleura Fahrenholz, Reprint from the second, third and fourth Jahresb. des 

 Niedersach. Zool. Vereins zu Hannover, vol. 29, pp. 44-46, (1912). 



Antennae five-segmented, similar in male and female. First pair of 

 legs small with slender claws, second pair larger with broader claws, 



