452 Mr. M. A. C. Hinton on the 



Diapus mirus, sp. n. 



Fuscus, elytris translucidis, fronte tota longis pilis flavis obtecta ; 

 palpi labiales triarticulati ; antennae inter oculos inserta3 ; pro- 

 thorace in utroque carinae latere congerie foraminorum trans- 

 versa ornato ; elytris obsolete lineato-punctatis, interstitiis planis 

 uniseriatim punctatis, margine apicale rotundato. 



Long. 3'7 mm. 



Loc. Assam. 



Head black, prothorax dark brown, elytra translucid but 

 darker towards the apex ; from the anterior edge of the front 

 arises a transverse ridge of stout yellow hairs divided into 

 four groups which extend upwards and backwards over the 

 whole of the front to the middle of the vertex. Between the 

 eyes are two large clusters of similar hairs, also divided into 

 groups, the inner pair of which extend straight out from the 

 front but are slightly bent downwards at the tips and then 

 end very abruptly, having a total length of over "5 mm. ; the 

 other two groups are twisted outwards round the first pair 

 and then cross the middle of the front, thus concealing nearly 

 the whole frontal surface ; the front is nearly smooth and has 

 a central longitudinal line. The labial palpi are similar to 

 those of the last species; the insertion of the antenna? is not 

 quite so near the vertex as in D. furtivus ; the prothorax has 

 no median line, but there is a group of large pores similar to 

 those of furtivus ; the elytra show some faint traces of lines 

 of punctures, and are rounded apically. 



LV. — Note on the Voles of the orcadensis Group. 

 By Maetin A. C. Hinton. 



In his recently published ' Catalogue of the Mammals of 

 Western Europe' Mr. Miller* refers the three Orkney voles 

 hitherto described to two species, namely : — 



(1) M. orcadensis, Millais, described from Pomona, and to 



which the voles of the islands Rousay, ShajTinshay, 

 and South Ilonaldshay (South Orkneys) are referred 

 also. 



(2) M. sandayensis, Millais, inhabiting the North Orkneys. 



With two subspecies: — 



a. M. sandayensis sandayensis, Millais, from Sanday. 



b. M. sandayensis westrce, Miller, from West ray. 

 * Miller, Cat. Mnmm. Western Europe, 1912, pp. 661-2, 694-700. 



