102 KHYNCHOPHOKA — SCOLYTIDAE. 



of antennae dilated toward apex, which is rounded and 

 produced within into a little tooth ; front half of thorax 

 rather strongly granulate, the granules crowded in middle 

 into a short raised transverse line ; elytra n(iarly twice as 

 long as together broad, apex deeply furrowed near suture, 

 rows of punctures rather feebler than in T. lincatum. L. 

 1-^ — If 1. Not common. T. domestictim, Lin. 



6. Elytra half as long again as together broad. 



Short cylindrical. Black ; antennae, legs, part of thorax 

 and the elytra brown-yellow, latter with suture, outer mar- 

 gin and a streak on disc black. Larger than T. lineaticm, 

 with club of antennae larger and more widened toward 

 front, rugosities of thorax coarser and pubescence closer 

 and longer, punctures of striae on elytra deeper, but not so 

 sharp-edged, lineation blacker and more defined. L. If 1. 

 Scarce. T. quercus, Eich. 



jB. Club of antennae rounded at apex [Xyloteres, Er.] 



Short cylindrical. Black; more or less of thorax and 

 the elytra yellow-brown, latter with suture, side margin 

 and often a streak on disc blackish. Thorax almost globular, 

 anterior margin not raised, disc with fine, scalelike, raised 

 transverse wrinkles and punctures ; elytra half as long 

 again as broad, with distinct large rows of punctures, apex 

 feebly furrowed near suture. L. 1\ — 1| 1. Eare. 



T. lineatum, Er. 



Hypothe^iemus, 



Cylindrical. Pitch-black, covered with fine hairs ; thorax 

 brownish-yellow, convex and tuberculate in front; antennae 

 and legs yellowish. Elytra more than twice as long as 

 thorax, witli punctured striae, apex rounded, entire. L. f 1. 

 Extremely rare. H. eruditus, Westw. 



Polygraphus, 



Black, brown or yellow-brown, with short, scale like 

 hairs ; antennae and legs pale yellow-brown ; punctuation 

 fine and (especially on elytra) very close. Thorax with 

 fine, raised central line ; elytra with indistinct traces of 

 striae, their raised basal margin finely toothed. L. f — 1 1. 

 Bare. P. 2Juhesccns, Eab. 



