Prof. Neumann describes only the cf (Mémoires de la Société Zoo- 

 logique de France, 1899, p. 245 et 278). 



Mr. S. A. Poppe, of Vegesack, sent me a tube with Acari, 

 fouud by Prof. K. Knüth in the acarid-chamber of Xylocopa 

 (Koptorthosoma) tenuiscapa Westw. of Java, XII, 1898. There were 

 4 species, viz: 



Glycyphagus ornatus Kram. 



Hypopus minutus Oudms., HOV. sp. (see below). 



Greenia perkinsi Oudms., UOY. sp. (see below). 



Trichotarsus koptorthosomae Oudms., UOV. sp. (see below). 



Remark: The presence of Glycyphagus ornatus Kram. in the acarid- 

 chamber is most probably a proof, that Prof. K. Knuth examined 

 a specimen of Xylocopa, which was preserved dry for a long time 

 in a collection of Hymenoptera. 



Dr. Kohlbrugge of Buiten zorg (now at Utrecht) presented me 

 with 6 nymphae, 24 (ƒ and 6 9 of an Amblyomma, caught in 1889 

 on Manis javanica Desm. in Java. Prof. Neumann, of Toulouse, de- 

 termined them as Amblyomma badium Nu. 



In July 1900 I myself received a Heliocopris bucephalus with 

 mites of Java. I found on it the folio wing species: 



Pachylaelaps ctenophorus Oudms., ilOV. sp. 



Pachylaelaps minutus Oudms., llOV. sp. 



Cillibano heliocopridis Oudms., UOV. sp. 



Tyroglyphus trifolium Oudms., nov. sp. 



6. Neoparasitus Oudms., nov. gen. 

 Neoparasitus is nearest related to Hydrogamasus Berl., differing, 

 ho wever, from it in the narrow ventri-anal shield of the female; 

 in the singular form of the ventri-anal shield of the male; in 

 the single jugular shields; and in the absence of accessory claws. 

 Neoparasitus lives free among decaying leaves. 



7. Neoparasitus oudemausi Oudms., nov. sp. 



(With Plate I, fig. 1—9) 

 Named after my brother, Mr. G. J. Oudemans, Assistent-Resi- 

 dent of Këdoe, Java, who sent me a female in 1883. 



