TEKRESTRIAL ACARI 0¥ THE TYNE rilOVINCE 57 



Lancashire (Grange - R. S. B.) Westmoreland 

 (Varty-Smith). Ireland. 



50. Rhodacarus pallidus, sp. nov. ^ 440 /x. 67. 



Translucent white with the appendages tinted with 

 brown. Considerably larger than rose^is. Epistome 

 with a simple acute tapering process without terminal 

 plume or basal teeth ; otherwise resembling rosei/s. 



West Allendale, under deeply embedded stones with 

 Pergamasus hamatns. I have seen two males only. 



DENDROLAELAPS, Halbert, 1915. 



Very like the preceding genus but with less con- 

 spicuous rostrum, and the male has a dorsal spur 

 on tarsus ii, as well as a ventral spur on femur ii. 



Type : oudemansii, Halbert. 



51. Dendrolcelaps oudemansii^ Halbert. 



Ireland, under bark. 



52. Dendrolaelaps bicornis, sp. nov. <^? 500 /a. 67. 



The female of this species differs only in size from 

 that assigned to oudemansii hy Halbert, so far as I 

 can see. The male also is of the same general 

 form, but the dorsum is excavated behind, and on 

 the forward rim of the hollow there is a pair of 

 very stout lateral spines, conical and obtuse. 

 This excavation is present in male nymphs also, 

 but the spines are acute and no longer than broad, 

 and there is another similar pair between them. 



Adults hyaline with brownish legs. Nymphs and 

 larvae milky white. 



West Allendale, abundant under bark of fallen trees 

 with Zerconopsis remigera. 



THINOZERCON, Halbert, 1915. 



Type : michaelii, Halb. 



Halbert makes this species the type of the new sub- 

 family; but I think a solitary genus should not be 



