ACARI 593 



referred both U. Kramerii and U. tecta Kram. to the genvTS 

 Urodinychus, established in 1903 (p. 270), although thèse differ 

 in the above mentioned repect. From this we may conclude 

 that he attaches no importance to whether the species hâve one 

 or two dorsal shields. Until the Uropodinae hâve been made 

 the subject of a thorough monographicstudy, itwillbe impossi- 

 ble to say which features are of greater, and which of minor, 

 systematic importance. My spécimens entirely agrée with 

 Canestrint's and Berlese's descriptions, and the drawings 

 of the latter. Both are, however, very summary, and the 

 nympha is not described, wherefore I will hère give a more 

 detailed description of both. 



Province (V Alger {Algérie). — Grotte du Veau marin, Che- 

 noua-plage, commune deTipaza, 7th September 1906, N° 167; 

 numerous cf, 9 and nymphae. 



If ri ivenan, Oulad Ben Dahmane, commune de Palestro, 

 18th September ; N^ 170, 3 nymphae. 



Distribution : England, Netherlands, Italy. 



Nympha (1). 



Length : 560 y.. Width : 420 ;x. 



Colour, straw-yellow. Texture, finely scaly. Shape, oval, 

 posteriorly broadly rounded, anteriorly more pointed. 



The dorsal side is smooth, with numerous small hairs of 

 equal size scattered ail over ; marginal shield not very distinct 

 and without the radiating striae which in the adult gives it 

 the appearence of being composed of a row of small, quadrangu- 

 lar shields. 



Tectum triangular, rounded at the top, where it is finely 

 dentate ; it projects slightly in front of the dorsal shield. 



(1) There is no positive évidence that the nympha descibed below is that of U. Kramerii, sa.ye 

 that both were found in one and the same cave, a fact which acquires more weight when we con- 

 sider how rarely the Uropodinae hâve been found in caves. There is, however, also morphological 

 évidence, such, for exaraple, as the identical and. very characteristic shape of coxae I. 



