Descriptions of New Scolytidse. 217 



basal portion obscurely shining, closely reticulate, obsoletely 

 punctate. Scutellum large, rounded triangular, black, rugose. 

 Elytra about as wide as the prothorax, and only one-fifth longer, 

 truncate at base, with subrectaugular shoulders, the sides parallel, 

 abruptly iuflexed behind, the apical margins obtuse and scarcely 

 conjointly rounded when seen from above ; surface cylindrical for 

 a little more than the anterior half, then strongly but obliquely 

 declivous and subretuse, black, the declivity obscurely reddish, 

 above subsulcate, the sulci obliterated at the base, evident towards 

 the declivity, interstices subuitid at the base, finely multi punctate, 

 then uniseriate-tuberculate and shortly pilose, the tubercles close, 

 the four or five preceding the declivity being strong, erect, and 

 spinous ; the latter slightly convex, dull, closely but more finely 

 seriato-granulate, the rows of granules separated by sulci, and 

 pilose with short hairs, not sharply margined below. Underside 

 piceous, thinly hairy, the abdomen with strong rugose punctuation; 

 legs brown-testaceous, the tibia) slender, curved, and finely serrate 

 above. 



Hah. Borneo, Sarawak (Wallace) ; Sumatra, from 

 tobacco (Grouvelle). 



The shape of the prothorax differs a little in my two 

 examples, being more uniformly curved from base to apex 

 in that from Borneo, whereas the Sumatra specimen has 

 a slight apical constrictiou. The species, though quite 

 peculiar in sculpture for a Xylehorus, and somewhat sug- 

 gesting a Hijlocurus, is normal in generic characters, and 

 is related to X.. iniheridus, of which the elytral sculpture 

 is destitute of the coarse tubercles marginiug the decli- 

 vity in the present species. 



Xylehorus arcticollis, sp. n. 



Mas. Elongatus, subnitidus, tenuiter erecte pilosus, fusco- 

 ferrugineus ; prothoi'ace valde elongato, post medium constricto, 

 apice utrinque rotundato, medio leniter emarginato, dorso depresso 

 ad apicem convexe declivi, antice granulato-asperato, postice sub- 

 tiliter punctato ; elytris prothorace subbrevioribus, subtiliter 

 confuse punctatis et pilosis, apice convexe declivi obsolete striato. 

 Long. 4"8 mm. 



Male. Elongate, slightly shining, fusco-ferruginous, thinly 

 covered with fine erect hairs. Front convex and subpulvinate 

 over the mouth, closely rugose, carinate along the middle, thinly 

 hairy, impressed on the middle of the fringed epistoma, above with 



