280 MR. E,. SHELFORD OX MIMETIC IXSECTS AXD [NoV. 4, 



large irregular punctures, and marked on each side with a longi- 

 tudinal line of rounded white scales, and in the middle with a line 

 of sm^all scales ; moreover, punctiform scales are sunk in the 

 punctures. 



The elytra are slightly broader at the base than the prothorax 

 in the middle, the sides are parallel, the apex is normally 

 narrowed ; they have above three narrow longitudinal costee, the 

 interstices between which are punctate and provided with rounded 

 scales ; the sides are foveate, each fovea shows a setiform scale ; 

 moreover, a line of rounded scales is present along the lateral 

 margin ; the outer angles of the elytra at the apex are simply 

 toothed. 



The metasternum and the base of the abdomen are covered 

 with rounded scales ; the rostrum beneath and the legs are 

 scattered with scale-like setae. The 3rd abdominal segment is 

 shoi't and contracted in the middle. 



2 . Agrees with the male in all respects except the follow- 

 ing : — The body is broader ; the head short, nearly square ; the 

 metarostrum is shorter, as long as the head ; the prorostrum 

 much more elongate, longer than the metarostrum ; the antennte 

 are inserted between the middle of the rostrum and its base ; they 

 are comparatively shorter and stouter ; the 3rd abdominal 

 segment is longer and not contracted. 



Length 17-23 mm. 



Ilab. Kuching (N.W. Borneo). 



Allied to D. furcillatus (Gylh.), but the new species has the 

 head shorter and the eyes more prominent ; the prorosti'um is 

 shorter ; the joints of the antennae are longer, the three apical 

 ones more distinct ; the apex of the elytra are broader and slightly 

 toothed ; the body is shorter and stouter. The female of the new 

 species is, moreover, distinguished by the metarostrum which is 

 shorter, and by the antennae which are inserted before the middle 

 of the rostrum. 



I have named this species in honour of Mr. R. Shelford, who has 

 kindly presented an interesting collection of Bornean Brenthids 

 to the Oxford University Museum. 



DiURUS siLVAXUS Senna. (Plate XX. fig. 4, § .) 



The female of this species being hitherto undescribed, I give a 

 short description of it : — 



The head is nearly square, with a fovea between the eyes ; 

 the metarostrum is short, hardly so long as the head, channelled 

 above, and slightly narrowed before the antennse ; the prorostrum 

 is slender, glossy, finely punctured, as long as the head and 

 metarostrum taken together. The antennse, which are conse- 

 quently more approximate to the base than to the apex of the 

 rostrum, are rather stout, with the 3rd joint longer than the 4th, 

 the 6th and 7th subequal, the 8th a little shorter, the three 

 epical joints well distinct and separate. The prothorax is strongly 

 contracted anteriorlv, the sides towards the middle are almost 



