564 MESSRS. C. WARBURTON AND N. D. F. PEARCE ON [DeC. 12, 



that the present species cannot be safely referred to the genus 

 Fridericia, which is so distinctly chai'acterised by the peculiar 

 paired character of its setfe. There remains only Henlea and 

 Bryodrilus^ from which, however, the species described in the 

 present paper differs in several points. With genera described 

 more recently than those included in Michaelsen's comprehensive 

 work just quoted, e. g. Hydrenchytrceus* , I cannot identify this 

 semipai-asitic Enchytreeid from India. 



It is true that four species, viz., Marionina glandidosa, Enchy- 

 trceus minimus, E. parvulus t, and E. turicensis, possess, as does 

 the species dealt with here, two sette in each lateral, and three in 

 each ventral, bundle ; but I do not regard those European species 

 as identical with the present Indian form. 



In the meantime I place the species in the genus Henlea, where 

 the charactei'istic glandular pouches of the gut are occasionally 

 absent (e. g. Henlea dicksoni), in default of living material and 

 a more exhaustive examination. I propose to name it after 

 Mr. Lefroy, who first directed attention to the species. 



10. On new and rare British Mites of the Family Oribatidce. 

 Bv Cecil Waebueton, M.A., F.Z.S., and Nigel D. F. 



Pearce, M.A. 



[Received November 21, 1905.] 



(Plates XIX. & XX. J) 



Since the publication of Mr. A. D. Michael's Monograph on 

 British Oribatidse in 1888, only a single new species, so far as we 

 are aware, has been described from these islands. This was a 

 Lohmannia taken in Ireland by Prof. Carpenter and described by 

 Berlese in ' Redia,' vol. ii. fasc. i. (1904, Aug. 18), as L. insignia. 

 Curiously enough this mite was in our hands while the Italian 

 arachnologist was describing it, and narrowly escaped another 

 specific name. 



No doubt the workers in this particular group have been few, 

 but it is a striking testimony to the thoroughness of Mr. Michael's 

 work that so long an interval should have elapsed without 

 substantial addition to the British list of Oribatidse, for the study 

 of which his labours have so admirably paved the way. 



For two years we have searched pretty thoroughly the 

 neighbourhood of Cambridge, and especially of Grantchester, and 

 have examined moss from many other localities, and we have 

 hitherto met with 82 of the species described in the Monograph, 

 and the seven forms, new, we believe, to science, of which the 

 diagnoses are given below, 



* Bretclier, Rev. Zool. Suisse, ix. p. 208. 



t This worm is described bj^ Friend (Irish Nat. xi. 1902, p. 110), thougli no 

 sufficiently to permit of any certainty. 



X Vox explanation of the Plates, see p. 569. 



