(db. a. C. OUDEMANSÌ. NEW LIST OF DUTCH ACAEI , II. 31 



Î genital shield almost hexagonal , 



anteriorly truncate Pseudoparasitus Oudms. 



? genital shield triangular, anteriorly 

 pointed, fitts in a posterior incision 



of sternal shield Parasitus Latr. 



? genital shield rounded anteriorly , 

 parallel with posterior margin of 



sternal shield 4 



4^ ^ Legs 1 without ambulacra . . .Macrocheles Latr. 

 I Legs 1 with ambulacra . . . .5 

 [ Ono dorsal sliield , even in nymphs; 



p, I without incisions Hydrogamasus Beri. 



Two dorsal shields , or one with deep 



incisions . , 6 



' c? fingers of chelae subequal . , Xyrtolaelaps Beri, 

 c? immovable finger minute, movable 

 altered in formidable knife-like 

 apparatus Euryparasitus Oudms. 



32. Pachylaelaps furcifer Oudms., nov. sp. 



33. Pachylaelaps ensifer Oudms., nov. sp. 



See my Notes on Acari, IX Series, which will appear in this 

 Journal. 



34. Parasitus subterraneus (Jul. Müller). 

 (With Plate 3, fig. 47—51.) 



Under the name of Porrhosiaspis subterranea, Julius Müller 

 described and figured a species in the Jahresber. d. Mähr Schles. 

 Ges., 1860, p. 176, tab. 3, fig. 2«— 2f/. 



Since that date the animal seems not to have been refound or 

 reobserved by acarologists. 



MüLLERs's description and figure are good enough to recognize 

 the animal at once. Yet I thought it better to give a new description 



