126 



FOREST ENTOMOLOGY. 



antennae large and solid, longer than the four-jointed whips ; thorax 

 transverse or globose, with four projecting corners. Female with a 

 convex forehead. Elytra ending abruptly, but without teeth. 

 The following are the specific characters, according to Fowler: 

 " I. Apical declivity of elytra with a very distinct furrow on each 

 near suture ; elytra without distinct longitudinal streaks at 

 sides ; thorax black . . . . T. domesticum, L. 



" II. Apical declivity of elytra without, or with an indistinct, furrow 

 on each near suture ; elytra with more or less distinct longi- 

 tudinal streaks at sides ; thorax more or less red, at all events 

 behind, 

 i. Elytra with the punctured stria? moderately deep ; club of 

 antennae subsecuriform, straight on one side, and some- 

 what rounded on the other . . T. quercus, Eich. 



(signatum, F.) 



ii. Elytra with the punctured striae superficial ; club of antennae 



rounded on both sides and at apex T. lineatum (01.) " l 



T. lineatum (01.) 



This insect bores into spruce timber. It will bore into timber 

 lying on the ground, which may have been cut during the winter, but 



Fig. 123. Workings o/Trypodendron lineatum 



in spruce timber. 



a, cross section of wood ; b, longitudinal section. 



Fig. 124. Trypodendron 

 lineatum. (From Fisher's 

 ' Forest Protection.') 



by preference it attacks broken stumps that is, standing portions of 



trees which have had two-thirds of their tops broken off by a winter 



gale. The female seems to be rather fastidious, as the material must 



1 Fowler's British Coleoptera, vol. v. 



