CHAP. XX. SCALE INSECTS. 135 



SUB-FAMILY III. (Coccinse.} 

 Genus KERMES (Targioni Tozzetti). 



These insects have the body perfectly globular, else with a 

 slight incision for insertion on the twig or branch. On an 

 external examination no trace of antenna?, legs, or even of 



Fig. 320. 



Fig. 321. 



mouth-parts are to be observed, the insect presenting precisely 

 the appearance of a gall. Chiefly found on oak-trees (Fig. 

 322). 



)(Genus RHIZOCOCCUS (Comstock). 



Antennae of larva and of the adult female, seven-jointed; 

 ano-genital ring with eight hairs ; tarsi of both male and 

 female, each with four digitules; margin of body, of young 

 and of female in all stages, fringed with tubular spinnerets, 



