ON SOME NEW PARASITIC MITES. 



769 



40. On some new Parasitic IVIites.. 

 By Stanley Hirst, F.Z.S. 



(Offered for publication by permission of tlie Trustees of the British Museum.) 



[Received September 18, 1921 ; Read October 18, 1921.] 



(Text-figures 16-43.) 



The present paper deals with various parasitic Acari, mostly 

 belonging to the family Gamasiclse, including eight new species 

 of Lijionyssus and a new species of PJiinonyssv,s,&\HO two new 

 genera closely allied to Rhinonyssics. A new Tarsonemid mite 

 belonging to the genus Poclaj)olvpus is also described, and a new 

 " Red Spider " {Paratetranychus trinitatis) found on grapes at 

 Trinidad. 



Text-fis'ure 16. 



Wiinonyssus novce-guinecB, sp. n., '^ . Ventral view. 



Genus Rhinonyssus Trouossart. 



RHixojfYSSUS NOv.E-GumEJi:, sp. n. (Text-fig. 16.) 



$ . Abdomen not elongated. The spinules or hairs usually 

 present on the venter in this genus ha,ve practically disappeared, 

 being mostly replaced by exceedingly rninute and inconspicuous 

 circular pores. Ancd plate distinct, being elongate pyi'iform ; it 

 is furnished with a pair of hairs. Second and third coxffi each 



