Glare Island Survey — Acarinida. 39 63 



and carry two separate dorsal plates, shaped almost exactly as in the 

 deutonymph of 0. Kochi Tragardh. Oudemans has figured a similar nymphal 

 stage in the case of 0. cervus (Kramer). 



Distribution. — Probably widespread in western Europe; recorded from 

 Holland and France (Pyrenees orientales, Tragardh). 



Crytolaelaps Kochi Tragardh. (PI. V, fig. 10.) 



1910. Tragardh 88, p. 416, tigs. 78, 79. 



Of this delicately organized species a single female example was found 

 amongst mosses in Clare Island during July. 



A full description of this mite will be found in the above reference. The 

 Clare Island specimen is an ovigerous female of rather broad shape, in com- 

 parison with its length, which is 768/j. The epistome (fig. 10) is rather like 

 that of C. nemorensis (Koch). 



Distribution. — Tragardh records this species from Siberia, Novaya Semlya, 

 Greenland, and Swedish Lapland (Sarekgebirge). 



Pachylaelaps pectinifer (G. et E. Can.), var. magnus nov. 



To a variety of this species must be referred a female Pachylaelaps, found 

 amongst moss in the Westport district. Compared with the typical form, this 

 specimen is remarkable for its large size, the length being about 1280^ and 

 the breadth 793^. It agrees in this respect, however, with one of the 

 Italian specimens which the authors refer to as an " esemplare gigante " (23, 

 p. 64). 



Compared with the type, this large Irish form is also remarkable for the 

 more quadrate shape, and the pointed anterior extremity is much more 

 acuminate. The epistomal process has a decidedly shorter stem than is shown 

 in Berlese's figures of the species, and the broad comb-like extremity is armed 

 with at least six strong teeth, most of which are finely branched at their 

 extremities. The length of the last pair of legs is about 1075^. 



As it seems likely that this forms represents a variety of P. pectinifer, I 

 would suggest for it the varietal name magnus (n. var.). 



There are few records of this species. Tragardh has recently described a 

 female Pachylaelaps, which he identifies, with reserve, as the present species. 

 Judging by the structure of the epistome and other characters detailed in his 

 paper (89, p. 560), not to mention the unusual cave habitat, the form probably 

 represents a distinct species or variety. 



Distribution. — Italy ; France (Lille, Moniez ; Departement de l'Ariege, 

 Grotte de Capetes) ; N. Africa (Tunis). 



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