25 



species. Ventrally the veutral portion of the geniti-ventral shield 

 is wider and more rounded posterioly. 



Habitat: Mus rattus, Arvicola arvalis. 



Patria : Netherlands, Germauy. 



5. Liponyssus koleiiatii Oudms., uov. sp. 



With Plate II, Fig. 32-34. 

 Of this species I found only a male; it was preserved in spirits 

 and caught with other parasites on Vespertilio pipistrellus by Mr. 

 S. A. Poppe of Vegesack. The species is related to L. albatus (C. 

 L. Koch). 



Male. — Length about 530 f*. — Dorsal side. One wide dorsal 

 shield with the usual hairs, which are minute. The anterior part 

 of the peritrema (Fig. 32) is dorsal and extends to the first leg. 

 On the ventral side (fig. 33) we observe a praesternal shield and 

 a sterni-geniti-ventri-anal shield. The coxae 2 bear a strong spine 

 directed forward and the two usual hairs directed outward. The 

 coxae 3 have their anterior hair strong and directed outward. 

 The legs are short and rather thick. The palps bear ventrally on 

 their first joint an appendage like a shallow swallow's nest. The 

 hypostome (Fig. 34) has the following characteristics. The bases of 

 the maxillae leave a cleft, through which the long and feathered 

 ligula is visible. The inner malae are pointed and slightly curved 

 outward, whilst the inner malae are very transparent, blade-like 

 and truncated anteriorly. 



Habitat: Vespertilio pipistrellus. 



Patria: Germany. 



6. Key to the species of Liponyssus Klti. 



Larva. 



Only one larva known L. lobatus Klti. 



Nymphs. 



| One dorsal shield 2 



) Two or more dorsal shields ... 3 



