HYPOPID.^. 



2:;i 



CASE There have been about twenty species of Hypopus described, 

 Dujardin having subsequently added a i^w more to those pre- 

 viously mentioned. 



Here, perhaps, should follow one of Hering's species found by 

 him on dried figs, and which he named Acarus passularum (Nov. 

 Act. Cur. 1838). It has been supposed to be a Hypopus, but the 

 uncertainty in which many points have been left by him, which 

 have since been found to be of importance, prevents more than 

 probable conjecture as to the genus to which the species he has 

 figured belongs. The figure he gives certainly does not look like 



one. 



Genus Trichodactyltjs {Dufoitr, Ann. Sc. Nat, 2nd Ser. 

 xi. 1839). 



This genus was proposed in 1839 by M. Leon Dufour for one 

 or two species of parasitic mites found on bees. The name is 

 derived from the last pair of feet terminating in one or more long 

 hairs, instead of in a tarsus or claw. They have obviously much 

 affinity with Hypopus, both in habit and structure, the posterior 

 legs of which terminate in something the same manner ; so much 



Leg of Trichodactylus Osmias. Copied from Donnadieu's figure. 



so that Dujardin regards them as belonging to the same genus. 

 But we think that the more powerful make and claws of the first 

 three pairs of legs in Trichodactylus, combined with the nidi- 



