297 



The mandïbles are of the usual type, having no teeth. 



The legs 1 and 2 are thick, having thick and short joints, of 

 which the trochanter only is narrow. The femurs 1 and 2 have 

 on their dorsal side a chitinous transverse bar hearing two spines 

 directed over the dorsum. The legs 3 and 4 are much slenderer. 



Remark. The presence of a rudirnental ventral shield is remar- 

 kable, for it is a proof that these animals descend froni animals 

 with a ventral shield. 



Habitat: Vespertilio murinus. 



Patria: France. 



26. Key to the species of Lipoiiyssus Klti. 



Nymphs. 



{ With 6 intermediate shields ... 2. 

 1 j With 4 ditto 3. 



!Legs slender, esp. 1 and 4 . . . L. rhinolophi Oudms. 

 Legs thick and short, esp. 1 and 2 L, chelophorus Oudms. 

 \ Post. dors. shield with 6 spines . L. musculi (0. L. Koch). 

 j Post. dors. shield with 2 spines . 4. 

 t Post. dors. shield half as wide as ant. L. lacertarum (Cont.) 

 I Post. dors. shield much narrower . L. saurarum Oudms. 



Males. 



!With broom of bristles around anus L.corethroproctus Oudms. 

 Without broom 2. 



!With 2 enormous curved spines on 

 each side L. ancinatus (Can.) 

 Without such unci 3. 



Dorsal shield narrow, surrouuded 



by unprotected skin . . . . L. musculi (C. L. Koch). 

 Dors. shield wide, occasionally and 

 especially posteriorly surrounded 



by narrow unprotected margin . 4. 



20 



