LOUSE MITES. 



325 



CASE claspers, as shown in the woodcut, with which the creature clasps 

 the hair of the mammal on which it lives. 



Mouth of Listrophorus Leuckarti, 

 Copied from Claparede. 



Leg^ of ditto. 

 Ditto. 



From the general resemblance of the snout to that of Myo- 

 _ coptes, which we figure below, it is probably formed on the same 

 P plan, although we do not know that it has been actually de- 

 ciphered. Full details of their structure are given by Pagenstecher, 

 (loc. cit.) and especially by Claparede in his Studien an Acareden^ 



No. x4r Listrophorus gibbus {Fagenst., Zeitschr. fur Wiss. Zool. XI., 156).— 14 

 Magnified sketch of ditto, copied from Pagensteclier's figure. 



Listrophortis g:ibbu<!. Very minute. Copied 

 from Pagenste Cher's figure. 



LlStropho'us Ifcuckarti. Very minute. 

 Copied from Claparede. 



Found on field-mice and in England on the ferret. 



J«'c. IS- Listrophorus leuckarti {Pagenst., Zeitschr. f. Wiss. Zool. XI. 109).— 

 15. Magnified sketch of ditto, copied from Claparede's figuie. 



Found on mice. 



Genus Myocoptes {Clap., Zeitschr. f. Wiss. Zool. XVIII.). 



This genus supplies the bridge which leads us to the Bird-loiise- 



