114 FOREST ENTOMOLOGY. 



winter. They deposit their eggs in small irregular clusters, and the 

 larvie move about in all directions from the mother-gallery, so that 

 the markings are very irregular. These larva? 

 UK^ transformed into fully developed beetles 

 by early autumn, Avhen some leave the brood- 

 places, whilst others remain at the far end of 

 the larval galleries for the winter and leave the 

 following spring. I have kept them in con- 

 finement over the winter, and they worked the 

 same stem as they had done the previous 



Fig. 107.— riilu'ophtlioru.s ■^'^''"■■ 

 lia"be?"f ^''"''' ^'*'''""' '^'^'^' ^"-■^'^^*^ (^^-^'- -^^'') ^•- '^^'^'"^ ^i '"'"• '" •'''^*^' 



of a dull, blackish slaty colour, with slight 

 greyish i)ubesccnce. The thorax is beautifully striated, and the 

 body somewhat globular in shape. ^ 



Sub-Family DRYOCiETINA. 



This is rather an extensive tribe, and as tlie whole of the 

 genera are practically arboreal insects, it is perhaps well to ap- 

 pend the following synoptical key, slightly modified from Fowler 

 — viz. : 



I. Funiculus of antennae with four or five joints, size variable. 



i. Eyes entirely divided ; club of antennae without sutures. 

 Beetles l)ore directly into the woody stem. 



Trypodenduox, Steph. 

 ii. Eyes entire or slightly eniarginate. 



1. Elytra clothed with scale-like pubescence, and sometimes 



with fine raised hairs in addition, not excavate at apex ; 

 scutellum very small ; club of antennae with distinct 

 sutures. Beetles snudl, generally w'orking in thin bark. 



Cryphalus, Er. 



2. Elytra without scale-like pubescence, glabrous or with 



outstanding hairs ; club of antennae orbicular and com- 

 pressed. 



^ There ajipears to be some coufusion us regards the nomeuclature of the two 

 species of I'hUuopIithorus — namely, P. rhododacti/lvg and P. Spartii. The insect 

 known abroad as P. Spartii is given' by Barbey as feeding on broom, and 

 P. rhododactijlus as feeding on branches of the spruce. 



