(dr. a. C. OUDEMANS). TSTEW list of BTJTCn ACARI, II. 33 



mandible bears a transparent apophysis (Fig. 47, 50, 51). In this 

 peculiarity the species approaches P. fucorum (de Geer) too. 



35 and 36. Parasitus sexclavatus and mustelarum Oudms., nov. sp. 



See my Notes on Acari , Vllllh and Xlth Series , which will appear 

 in the TijdtscJir. cl. Ned. Dierh. Vereen, or in this Journal. 



37. Parasitus vespillonum Oudms., nov. sp. 

 (With Plate 3, fig. 52 and 53), 



Only the nymph is known to me. I found it on Necrophorus 

 V esp ilio L. 



Length 800 .u. 



In external features (Fig. 52) it resembles P. coleoptratorum (L.) 

 deutonympha coleoptrala. Yet it is not so chitinized, much paler 

 and deprived of the characteristic twelve rod-like hairs on the 

 two dorsal shields. 



The episioma is moreover so characteristic, that the species is 

 at once recognizable from other ones. It is (Fig. 52) quinquedentate; 

 the middle tooth is bottle-shaped ; the outer lateral ones gently 

 curved forward and inward ; the inner lateral ones very small. 



The horns of the hi/posiome (Fig. 53) are partly hidden by the 

 niaxillar inner malae. There are two jugular shields ; the sternal 

 shield is normal, with 8 fine hairs. 



38. Parasitus bomborum Oudms., nov. sp. 

 (With Plate 3, fig. 54—57). 



Of this species only the travelling nymph is known to me. I have 

 found it living free on grass , and Mr. W. J. Klaassen , of Amster- 

 dam , last year procured me several specimens found by him on 

 a Bombus terrestris. 



The species is allied to P. fucorum (de Geer). At first sight 

 it is the same, but there are fundamental differences. 



Tijdschr. v. Utiiom. XLV. 3 



