30 Mr. G. C. Champion on 



32. Xylophilus troglodytes, n. sp. (Plate II, fig. 18, <£.) 



Elongate, rather convex, dull; nigro-piceous, the outer joints of 

 the antennae and the basal portions of the femora ferruginous, the 

 palpi and tarsi testaceous ; closely, minutely, the elytra more sparsely 

 and distinctly, punctate, the interspaces alutaceous throughout; 

 clothed with very fine, sericeous, greyish pubescence, the upper 

 surface appearing plumbeo-pruinose. Head moderately large, a 

 little smaller in $, narrowly extended on each side behind the eyes, 

 the latter very large in $, smaller in $, deeply emarginate, occupying 

 nearly the whole of the sides of the head; antennae (<$) pilose, 

 slender, filiform, extremely elongate, longer than the body, joint 

 2 short, 3 twice as long as 2, 4-10 nearly equal, 4 longer than 3, 11 

 strongly, obliquely acuminate, ($) a little shorter and more slender; 

 apical joint of maxillary palpi extremely broad, that of the labial 

 palpi stout, securiform. Prothorax convex, about as long as broad, 

 the sides obliquely convergent anteriorly and parallel thence to the 

 base. Elytra elongate, subparallel in their basal half, in § nearly twice 

 as wide as the head and somewhat inflated, in <$ a little narrower, 

 flatter, and with a rather deep, transverse, post-basal depression. 

 Beneath cinereo-pubescent, densely, minutely punctulate, with some 

 scattered fine punctures intermixed; ventral segment 5 broadly 

 depressed down the middle in J. Legs very elongate, slender; 

 posterior femora subangularly dilated at about the apical third 

 beneath, stouter in $ than in $; basal joint of posterior tarsi almost 

 straight, very elongate in $. 



Length 2f-3, breadth 1 mm. {$ $.) 



Hab. Malay Peninsula, Batu Cave, Selangor (H. N. 

 Ridley). 



Three specimens, received by the British Museum in 

 1897, two in good condition and assumed to be <£ and 9, 

 the third fragmentary and apparently <$. They are 

 labelled as having been found in total darkness, in the 

 Batu Cave, a strange habitat for a Xylophilid and possibly 

 accidental. This species is allied to the Indian X. armipes 

 and X. jplumbeus, but it is at once separable from them 

 by the very elongate, slender, filiform antennae, the still 

 longer legs, the more finely, evenly punctured elytra, etc. 

 X. troglodytes bears a certain resemblance to the Scyd- 

 maenid genus Mastigus. These insects have an extremely 

 broad apical joint to the maxillary palpus, and they may 

 have to be removed from the present genus, with X. 

 palliditarsis, Pic, and X. sellalus, Ch., and others. 



