282 BRITISH TYROGLYPHIM. 



hairs near the distal ends of most joints, except the 

 tarsi. Each tarsus of these legs bears four large hairs 

 near its distal end, a few fine curved hairs, and a large 

 claw. The third tarsus bears at its end four large and 

 some smaller hairs and a minute claw. The fourth leg 

 ends in three long and some shorter hairs. One of the 

 latter is lanceolate; there is not any claw. The two 

 hinder pairs of legs are set far under the body. The 

 anus is between the femora of the fourth pair of legs. 

 There is a short, straight sternum, but no epimera are 

 joined to it. The apparatus for holding the hairs of 

 the host (PL XVII, fig. 11) is as follows : At the 

 posterior end of the ventral surface is a median, con- 

 cave, longitudinal channel (b) in which the hair lies; 

 this is overlapped by a flexible, lip -like organ (d) on 

 each side ; the two lips cross slightly when there is not 

 any hair beneath them ; they are provided with power- 

 ful retractor muscles which draw them closer to the 

 body. Each lip bears a large chitinous plate on its 

 inner surface, and on the inner side of this plate is a 

 strong chitinous band (e) with transverse ridges. On 

 the abdomen, immediately above each band (when the 

 creature is dorsal surface upward), is a circular chitinous 

 plate (/) with radiating ridges; the hairs of the host 

 are firmly held between the bands and the circular 

 plates. 



This hypopus was well described, and was figured 

 by Kramer in the paper quoted in the synonymy. 



Habitat. The hypopial nymph is found upon the 

 common mole (Talpa europdea). The adults and nymph 

 were found by me in the nests of the mole, but never 

 on the mole itself ; they are not rare. The creature, in 

 some stage, has been recorded in England, Germany, 

 Holland, and Italy. 



