74 



N n . 34. Thrombidium insulanum in the Abh. Nat. Ver. Bremen 



1901, Bd. XVII, Heft 1, p. 222, tab. III, fig. 1—8. 

 N". 37. Tarsonemus soricicola in the Tijdschr. voor Entomologie, 



v. 46, p. 5, tab. I, fig. 20 and 21. 

 N°. 39. Nanacarus minutus in the Tijdschr. voor Entomologie, 



v. 46, p. 8, 11, tab. II, fig. 23—28. 

 N°. 44. Anoetus neglectus in the Tijdschr. voor Entomologie, v. 46, 



p. 21, tab. III, fig. 43 and 44. 



2. Parasitus sexclavatus Oudms., uov. sp. 



(With Plate V, fig. 1-3). 



Only the nympha is known to me. Yet this is characteristic 

 enough. It was fouud in one specimen on Geotrupes sylvaticus, 

 May 1901. 



Colour pale, between yellow and ash-colour. 



Length 294 p. 



Dorsal sicle. The creature is well-shouldered (Fig. 1), and has 

 between the shoulders and the anterior end of the abdomen the 

 usual intermediate shoulders of well shouldered forms. Two shields 

 protect the dorsum. The anterior one has very declining shoulders, 

 is one and a half time longer than broad and bears 7 irregular 

 transverse rows of six minute bristles each. The posterior one is 

 almost quadrangular, with concave anterior margin and rounded 

 sides and posterior margin, and bears 5 regular transverse rows 

 of six hairs each. 



Ventral side (Fig. 2). In three particulars this remind us of 

 the genus Seiulus. 1. By the elongate, posteriorly truncated sterni- 

 genital shield with 5 pair of hairs. 2. By the indication of the 

 future female genital aperture. 3. By the indication of a future 

 large ventri-anal shield. The characteristic which distinguishes 

 the animal from all the known Parasitidae, is that on the coxae 

 of the palps and of the second and third legs there is a hair 

 formed like a short stout club (Fig. 3). 



Epistoma rounded. 



