OF INSECTS. 31 1 



number live exposed on the foliage of plants, but 

 others take up their abode in the interior of slender 

 shoots and feed upon the immature pith; others 

 lodge in the interior of fruits and cause them 

 speedily to decay. 



The first insect selected as an example of the 

 family of saw-flies, is named 



CIMBEX DECEM-MACULATA. 



PLATE XXX. Fig. 2. 



Leach Zool. Mis. III. p. 106 Curtis' Brit. Ent. I. PI. 41. 

 THE genus cimbex possesses six-jointed antennae, 

 of which the second joint is much the longest, 

 and the terminal one oblong and club-shaped. The 

 two terminal joints of the maxillary palpi are small 

 and ovate ; the labial palpi scarcely longer than the 

 labium ; labrum small and oblong ; mandibles large 

 and acute, the inner side irregularly toothed ; hinder 

 thighs very thick in the males ; the tibiae terminated 

 by a pair of obtuse spurs, and the tarsal joints pro- 

 duced into a spine beneath. 



The larvae of Cimbex have twenty-two feet; and 

 some of them, when annoyed, are capable of squirt- 

 ing a greenish liquid from two lateral apertures. 

 When about to enter the pupa state, they form an 

 oblong hard case, which is usually attached to the 

 tree or shrub on which they fed. We have seven 

 or eight British species, of which the above is one 

 of the rarest. The body is black, the abdomen 

 tinged with violet, the third and seventh segments 



