Broun. — O71 the Larva and Piipa 0/ Lasiorhynchus barbicornis. 229 



length of tweuty-three lines, are bent below the body, finely grooved super- 

 ficially as far as the antennal insertion (not far from the apex), are without 

 other distinct sculpture, though at uncertain intervals seeming slightly con- 

 stricted ; the antenncB repose at each side, extend forwards as far as the 

 intermediate coxae, in one specimen the external filmy covering has been 

 removed, thus displaying the five terminal joints in perfection ; the position 

 of the eyes, identical with that of the imago, is clearly indicated by the 

 lateral dilatation of the head. The prothorax is neither quite conical nor 

 cylindrical but just intermediate in form, is armed at its apex with two pairs 

 of horn-like, sometimes wrinkled, protuberances, two other but much 

 smaller ones behind these, and two larger ones at its base ; the front pair of 

 legs attached thereto are obliquely folded below. The mesothorax is short, 

 divided from the preceding by a deep frontal suture, is impressed with two 

 longitudinal grooves ; from it issue the elytra which lie obliquely along the 

 sides, and the middle pair of legs. The metathorax is longer than the latter, 

 very uneven, and bears the membranous wings and posterior legs; the tarsal 

 claw envelopes of these latter reach the extremity of the body, and are 

 perceptibly marked off from the covering of the tarsi. The abdomeri consists 

 of eight free segments, all of which, except the last, are distinctly separated 

 from one another, the terminal ends with two large protuberances having a 

 spine-like process at the extremity ; their iipper and lower surfaces are 

 closely, finely, and irregularly wrinkled ; the basal and two apical segments 

 are more or less spiniferous above, the others are considerably raised 

 behind, and on the summit of each elevation are placed eight short cor- 

 neous, almost bi-articulate, spine-like processes forming a transverse row, 

 whilst two or more less evident ones may be noticed on the depressed 

 frontal portion. 



The female differs in several respects ; the rostrum extends but little 

 beyond the metasternum ; the antennce, inserted nearer the base than the 

 middle of the beak, are directed forwards and then sideways, thus embracing 

 the surface just behind the basal tubercles of the prothorax ; it is only half 

 the bulk of the other sex. 



Habits of the Insect. 



This paper would be held to be incomplete without some account of the 

 habits of the insect. I shall not, however, inflict on the members of the 

 Institute an elaborate series of details, which, indeed, could not be done 

 without long and close observation under favourable conditions, but will 

 content myself with the mere recital of facts, from which you may draw 

 your own conclusions. 



The perfect female gnaws a hole but little broader than a pin's-head, 

 and in the cavity deposits the eggs. If the tree or log be visited some 



