172 



ARACHNOIDEA, 



CASE all over her body, had only to scratch herself to see minute mites 

 come out of her skin, but none of them spread to, or propagated 

 the disease to, her attendants. Gervais named this species Der- 

 manyssus Boryi, in compliment to the narrator. 



Dermanyssus hirundinis {Hei'inann, Mem. Apt. 84.) 



About the size of a large pin's head. Found on the swallow 

 with other vermin. 



No. 22, Dermanyssus pipistrell^ {Gerv., Ann. Sc. Nat. 1841). — 22. Enlarged 

 sketch of ditto, copied from Gervais' figure. 



The Dermanyssi are not abso- 

 iutely confined to birds — they are 

 also found upon bats. The present 

 is a species found upon the smallest 

 of European bats (VespertiHo pipis- 

 trellse). It is very like the common 

 bird species, but more oval, and 

 the colour (reddish brown) is more 

 diffused. 



It would even appear, from M. 



Duges' observations, that some 



species attack snakes also. He 



speaks of two so attacked that had 



come under his observation; one, 



the common Coluber natrix, which 



he kept domesticated for several months, and which perished 



exhausted by these parasites nestled under its scales, which all 



his efforts had failed to destroy. 



There are other Dermanyssi found on bats — new species 

 from new countries almost always furnishing them, as well as 

 new species of Pteroptus. Kolenati has described a number 

 of these, and proposed various genera for their reception, under 

 the names of Liponyssus, Ichoronyssus, Macronyssus, I.epro- 



Dermanyssus pipistrellse. 

 Copied from Gervais' figure. 



