30 (db. a. c. oudemans). new list of dutch acari, II. 



in feminis^ interne calcarati. If we adopt rigorously this distinction 

 — and there is hitherto no reason to deny it — Laelaps meri- 

 dionalis G. et R. Can. is not a Laelaps, hni one oiihe Gamasidae 

 (^_ Parasitidae), and as it differs in some fundamental characteristics 

 from the known species if this family, I propose to create for it 

 a new genus : Tseudoparasitus Oudms. (see below). 



30, Euryparasitus Oudms., nov. gen. 

 (for Gamasus terrihilis Michael). 



Gamasus terrihilis Michael is a very singular member of the 

 family of the Parasiiidae. Michael has delineated the genital shield 

 of the female wrongly, and tlierefore we must excuse Berlese 

 for having ranged tliis species amongst the \ev^ Parasitus {Ga7nasus) 

 on p. 61/62 of his work « Mesostigmata ». 



The genital shield of the female of this species is perfectly re- 

 sembling that of the nymphae iphidifoi'mes of the genus Laelaps 

 (see Berlese, Ac. Myr. Scorp, Ital. fase. 40, tab. 8, fig. 9). 



I propose for this aberrant species the genus J^urj/parasilus and 

 the following emendation of the tabula on p. 59 of Berlese's 

 Mesostigmata. 



31. Key to the genera of Parasitinae. 



Parasites of Vertebrates, therefore 

 a soft skin , with inconspicuous 



1. ( shields Haemogamasus Beri. 



Free in moss , decaying leaves , etc., 

 well chitinised 2 



i' 2 ventral and genital shields fused, 

 anal shield free Pachylaelaps Beri. 

 ? ventral and genital shields free. .3 



