190 



ARACHNOIDEA. 



CASE legs. It is to be noticed, too, tTiatiwo specimens of a species of 

 Ixodes (named Ixodes longipes by M. Lucas — Bull. Soc. Ent. Fr. 

 1872); were lately taken m one of the subterranean caverns of 

 the Pyrenees, viz., -the upper cavern of Mas-d'azil in the Ariege 

 and it, too, was distinguished by the length and slenderness of its 

 legs. There can be little doubt, we imagine, that they were 

 individuals that had dropped from some bat that had made the 

 cavern its place of retreat ; and it is, perhaps, not wholly irrele- 

 vant to remark that disproportionate length and slenderness of the 

 legs is a very common modification of the parts in blind insects 

 inhabiting such caverns : for example, Anopthalmus, Aphsenops, 

 Leptoderus, etc. 



Genus Ixodes — without eyes. 



Nos. Ixodes erinaceus {Aud., Ann. Sc. Nat. 1832). — 1. Enlarged figure of 

 4' 5^ 6'. male ; 2. Specimen of ditto (5) ; 3. Enlarged figure of female, half fed ; 



4. Specimen of ditto in phial, ditto (11) ; 5. Enlarged figure of female, 

 full fed ; 6. Specimen of ditto in phial (4). 



Ixodes erinaceus (laale). 

 ij lines in Icngtli. 



Ditto (female). 

 Magnified and natural size. 



. This is a common species in Britain, and is found in rough 

 herbage, woods, and on dogs, cattle, foxes, hedgehogs, &c. It is, 

 we believe, the species that is commonly, although erroneously, 

 taken for Ixodes ricinus, at any rate generally known as the dog 

 tick. 



