112 (du. a. c. ottdemans) 



sides leaving, however, between them a free space. The genital 

 plates perfectly pentagonal, show 7 pairs of minute smooth hairs 

 near the border of the aperture, and one pair of minute smooth 

 hairs close to the hind corners of the pentagon. Anal plates nearly 

 touching the pentagon of the genital plates , provided with A pairs 

 of minute smooth hairs. On the sides of the anal plates the ventral 

 plate bears two pairs of minute feathered hairs. The dorsal plate 

 or notogaster is considerably sufflexed on to the ventral side, and 

 bears on this side two pairs of feathered hairs, as shown in our 

 figure. 



The legs bear feathered hairs , except a few hairs on the tarsus 

 The claws are tridactyle (fig. 4). 



The surface of the céphalothorax, epimera , genital, anal and 

 ventral plate is smooth , that of the notogaster and of its ventral 

 suiilexed part is sculptured, as is shown in fig. 5. 



3, List of 4cari, collected by Mr. A. R. Spoof near 

 Astrachan and near or in °Abo (Finland). 



Mr. A. R. Spoof, of °Abo, was kind enough to send me some 

 Acari for determination. 

 These are. 



1. Sculovertex spooß nov. sp. — adult and nympha. — 



2. Macrocheles ^Holostaspis) marginatm Herm., trito-nympha $ 

 (= Gamasus hadius Koch) ; it was attached to a fly , Musca do- 

 mestica L. , in °Abo, Finland, 1895. — 1 ex. 



3. Argas reßexus Fabr., found by him in a farm in the Russian 

 village Ssamjani, near Astrachan, 1879. — 1 ex. 



4. Sciitovertex spoofl, nov. sp. 



The dichotomical tabula of Scutovertex (Das Tierreich , Oriba- 

 tidae) should be altered as follows : 



[ Psstg. org. with short peduncles and small globular 

 4 I head ; Ung. trid. — 5. 

 [ No Psstg. org. visible. — Aa. 

 \ Ung. mond. — L. 620 /<. S. hlUveatus. 

 j Ung. tridactyle. — L. 760 ;". S. spooji Oudms. 



