XYLOTRECIirS. 241 



Genus XYLOTRECHUS. 



Xyloti-echus, Chevrolaf, Ant}. Sue. Eat. Fr. 18G0, p. 4oG; Lacord. 



Gen. Coleopt. ix, p. 77 (1809). 

 Amaursestbes, Ckevr. (in part.) Me»i. Soc. li. Sci. de Lie(ie, xviii, 



p. 327 (1863). 



Type, X sartorii, Chcvr., a Mexican species. 



Range. Both hemisplieres. In the Western heniisphere not 

 recorded south of Mexico, nor in the Old World from Africa or 

 Australia. 



Head vertical in front, not raised between the antennae ; tlie 

 latter rather widely separated at the base, inserted vinder the 

 lateral edges of the front, which appear as two more or less promi- 

 nent cariuiE continued downwards to a greater or less extent along- 

 each side ; the front furnished in additioa with from one to five 

 more or less distinct carina. Antennce shorter as a rule than half 

 the body, sometimes extended to the middle of the elytra or a 

 little beyond it in the cJ ; first joint equal to or longer than the 

 third ; third to fifth subequai ; sixth to tenth successively shorter, 

 sometimes decreasing slightly in thickness. Prothorax more or 

 less rounded at the sides, usually some^^'hat asperate or granulate 

 on the middle of the disc. Elytra slightly narrowed backwards 

 from the base, broadly truncate at apex. Legs moderately long ; 

 femora thicker in the S ; the hind pair extend to a greater or less 

 distance beyond the apex of the elytra in the S , but do not reach 

 as a rule to the apex in the 5 . First joint of hind ta-rsus about 

 twice as long as the next two joints united. 



1. Eiies large., extended on to the front ; the face correApondinghj 

 contracted in the middle ; pygidinm of $ emarginate at apex. 



270. Xylotrechus smei, Lap. et Gory (Clytus), Hist. Nat. et Iconogr. 

 des Ins. Coleopt. {Mon. dii genre Clvtus), p. 87, pi. 8, fig. 46 

 (1841). 

 Clytus vicinus Lap. et Gory, I. c. p. 38, pi. 8, fig. 47. 



Brown above; with a greyish or yellowish pubescence that 

 covers the head and most of the prothorax and forms bauds and 

 spots on the elytra, disposed as follows : — (1) a transverse band on 

 each at the base, followed a little behind by (2) a short transverse 

 spot ; (3) a narrow band which begins near the scutellum, passes 

 close by the suture, diverges a little from it posteriorly and at a 

 short distance before the middle curves outwards to the side, thence 

 it bends forward a little before reaching the margin ; (4) a narrow, 

 obliquely transverse, somewhat wavy band, placed a little behind 

 the middle ; (5) an apical band, which is slightly produced forwards 

 at the suture. Body beneath marked with spots or bauds of whitish 

 pubescence. Vertex of head marked with a fine carina which 

 divides anteriorly into two finer carinse ; front with four carinse, 

 the lateral ones oblique or slightly curved, the intermediate two 



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