ACARI 611 



The increase in the length of the legs is not due to the pro- 

 longation of any one joint, but ail the joints share in it to the 

 same extent. Therefore, the relative length of the joints is the 

 same in the variety as in the main for m. 



The legs are plentifully provided with long, pointed hairs, 

 of the shape typical of the genus. The ventral ones o^ thèse, 

 which stand out more or less perpendicularly, are about twice 

 as thick as the dorsal ones, and generally arranged in groups 

 of three. Besides the legs, the a mbulacr es also show some spé- 

 cial adaptations which are of great interest. 



la 1907, when making a comparison between several species 

 of Rhagidia, I pointed out that the claws of Rh. gigas were pro- 

 vided with a sharp ventral tooth near the base (Tragardh 

 1907, p. 22, text-fig. 43). In the var. longipes this is much more 

 developed, sharply pointed, and curved downwards, so as to 

 form a veritabe second claw (fig. 144 a and h). The claws 

 themselves are also very higlily developed, curved at a right 

 angle in the middle. The claws of legs I differ from the rest 

 in being bifurcated, with slightly smaller, latéral claw. 



It is possible that Scyphius spelœus Wank, is synonymous 

 with R. gigas. var. lo7igipes. In spite of the inaccuracy of W's 

 figures it is quite évident that his species is a Rhagidia. As var. 

 longipes is one of the few cavernicolous species which enjoy 

 a wide distribution and 8. spelaus occurs in ail the caves of 

 Mâhren this seems to argue for this supposition. 



Subfam. Erythrainae. 



RHYNCHOLOPHUS Dug. 

 Rh. sp. 



Département des Pyrénées-Orientales {France). — Grotte de 

 Sainte-Marie, commune de Prats-de-Mollo, canton de Prats-de- 

 MoJlo. 22 May 1908 ; W 220. 



This species I hâve not been able to identify with any of 



