238 PROTECTION AGAINST INSECTS. 



A. SUBFAMILY TOMICINI. 

 Description of Subfamily. 



Head generally round, hidden beneath the thorax, and 

 scarcely visible from above. Antennal funiculus 2 to 5-jointed. 

 Thorax not contracted in front, convex or subspherical, its 

 surface covered in front with small asperate or tubercular 

 projections, behind usually punctate or smooth. Tarsal joints 

 simple, never bilobed, the first much shorter than the other 

 three together. Elytra sloping downwards at the apex, the 



Fig. 99. -Tomicus typographies, L. 

 a Imago, b Larva, c Pupa. 



sloping portion, termed the apical declivity, sometimes im- 

 pressed or excavate and often toothed. Under-surface of the 

 abdomen flat. There are 11 genera and 29 species recorded 

 from Britain. 



They generally live between the bast and sapwood, some 

 entirely in the wood, and a few in the outer bark, and are very 

 common in coniferous forests. 



1. Tomicus typographus, L. 



a. Description. 



Beetle 4*5 to 5'5 mm. long, stoutly built, dark brown or 

 blackish, shining, hairy, with testaceous antennae and legs. 

 Head with a small tubercle immediately over the mandibles. 

 Thorax as broad as long, its dorsal surface with rather fine 

 sparse punctation over the posterior half. Elytra with deeply 



