THE BRITISH LICE (ANOPLURA") AND THEIR HOSTS 17 



Genus Enderleinellus Fahrenholz. 



Anterior and middle pairs of legs of equal size, small and with 

 slender claws. Posterior legs very large and stout, with stout claw. 

 Head entirely without temporal angles. Abdomen with or without 

 chitinized tergal and sternal plates. Abdominal segments for the 

 most part with but one row of hairs or spines in both male and 

 female. Third sternite usually with a widely separated pair of 

 chitinized plates or areas, one near each lateral margin. Pleurites 

 present on second to fifth or sixth segments. 



7. E. sphcerocephalus (Nitzsch). From Squirrel (Sciunts 



vulgaris). 



Genus Hcemodipsus Enderlein. 



Anterior legs small, with slender claw, middle and posterior legs 

 larger, sub-equal, with heavier claws. Head broad, thorax very 

 small. Abdomen entirely without chitinized tergites and sternites, 

 each segment with a single transverse row of spines or hairs. Pleural 

 plates very small or wanting. Gonapods very short. 



Recorded only from Leporidce (Rodentia). 



8. H. lyriocephalus (Burm.). From Mountain Hare (Lepus 



ti midas) and Brown Hare (L. europceus). 



9. H. ventricosus (Denny). From Wild and Domestic Rabbit 



(Oryctolagus cuniculus). 



Genus Hoplopkura Enderlein. 



Antennae similar in the sexes. Anterior legs small with slender 

 claw ; middle legs larger with stouter claw ; posterior legs very stout 

 with stout, heavy claw, and usually with a small, pointed protuber- 

 ance on the anterior margin of the tibia. Female with most of the 

 abdominal tergites divided into three transverse plates, each bearing 

 a row of spines. Males with most of the abdominal tergites and 

 sternites divided into two plates or undivided, but with some divided 

 into three. Anterior division of the third sternite in both sexes 

 with two pairs, or with two groups of three very stout and con- 

 spicuous spines. Pleural plates present. 



From Muridce (and ? Soricidce). 



10. H. acanthopus (Burm.). From Field Vole {Microtus 



agrestis), House-Mouse (Mus musculus), and ? Common 

 Shrew (Sorex aranei/s). 



11. H. longula (Neumann). From Harvest-Mouse (Micromys 



mtnutus). 1 



1 Not yet recorded from Britain. 



(To be continued.) 

 6l C 



