20 (dr. a. c. oudemans'}. notks on acari vî. 



, On the anterior Abd. a marking 



2. like a trapezium T. queenslandiae Can. 



(No such marking 3 



iA minute sucker near coxae 2 

 and 3 T. mycophagus Mégn. 

 No suckers there T. fllCOrum Oudms. 



According to Berlese T. agilis Can. has hypopi similar to those 

 of T. mycophagus Megn. This is very doubtful. 



22. Anoetus spiniferiis Michael. 



(With Plate 3, fig. M and 42.) 



I found this hypopus among other parasites, picked up by Mr. 

 S. A. Poppe at Vegesack, in i^9S, on &. &ore.vvt(/.(/arh'i. As Michael 

 could not describe it in details, these follow here. 



It IS a beautiful creature. Its length is about 260 /'. Its shape 

 s elongate, even when the lateral margins are extended, the more 

 when they are sufflexed ventralward, which is usually the case^ 

 when the creatures are preserved in spirits. 



The dorsal side (Fig. 41) of the abdomen is polished, punctulated, 

 and provided with almost invisible minute hairs which are arranged 

 ill four longitudinal rows. The marginal rows have 5 hairs, the 

 dorsal ones 4 hairs each, of which the 4th pair may be reckoned 

 in the marginal rows too. The céphalothorax is polished, without any 

 punctulation, and provided with 2 pair of minute anterior marginal 

 hairs. The tactile organ, comparable to the mentum oï Paras'Uidae 

 {Gamasidae) is long and projets a good deal beyond the anterior 

 margin of the céphalothorax. 



The ventral side (Fig. 42) shows the following particulars: The 

 epimera of legs 1 form an Y, of which the trunk extends far 

 backward till the line behind the coxae 3. The epimera 2 join the 

 epimera 3, and these meet in the median line with the sternum 

 The epimera 4 meet too in the median line with tlie above men- 

 tioned trunk. The proximal ends of the epimera 4 are united by 

 a chitinous bar which touches the anterior border of the genital 

 aperture. Here again a short chitinous bar projects forward. There 



