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ACARI 521 



tion lie and Jeannel.had collected in tlie caves of France, Spain 

 and Algiers, a collection numbering not less than 84 tubes from 

 différent localities. I am much indebted to Prof. A. Berlese of 

 Florenz and to D^' A. C. Oudemans of Arnhem, Netheriands 

 for their valuable assistance in identifying the Oribatidœ and 

 the Spinturnicinœ, and I beg to tender them my best thanks 

 for this kindness. 



Addendum. While the présent paper went through the 

 press a paper « Description des Gamasides cavernicoles récoltés 

 par A. Viré », by A. Bonnet appeared. As Viré lias collected 

 in some of the caves explored by Racovitza and Jeannel, it 

 was very likely that at least some species studied by me would 

 be présent in Virés collection. This proved also to be the case. 

 Eugamasus omphalus Bonnet is synonymous with the species 

 named E. gibbus by me. As to Eug. Virei Bonnet, it is possibly 

 synonymous with E. cornutus var, pygmaea. Bonnets' descrip- 

 tion and drawings are however not accurate enough (especially 

 that of the metasternal and epigynial shields (1) to enable me 

 to settle this question. 



Finally E. gomphius Bonnet is certainly synonymous with 

 the species I hâve identifie d with E. niveus Wankel. 



On terminology employed. 



In the descriptions I hâve endeavoured to treat the species 

 in as detailed a manner as possible, and to accompany the des- 

 criptions mth numerous drawings. This is, in my opinion, abso- 

 lutely imperative in order not nierely to give a description, 

 with the help of which the species may be identified, but also 

 to give enough morphological data to enable future workers 

 on the group to ascertaiii the systematic afitinities, without 

 liaving to re-examine the type-species. In order to faciUtate 

 the use of this paper for purposes of identification, I hâve 



(1) It the species delineated by B. liiul met;islcriuil shieldes shaped a.^ lie draws lliem it 

 would not be referable to Eugamasus uor to auy other genus I know of. 



