116 



THE MONTHLY BULLETIN, 



Fig. 99. — Frosted scale, Eulecanium 



(Essig 



pruinosum (Coq. ). 

 P. C. Jr. Ent.) 



Mature scales on walnut. 



Fig. luo. — Immature specimens 

 of the frosted scale on loganberry 

 cane. (Original.) 



lialf-grown forms are very flat 

 (Fig. 100). The surface is covered 

 with white frost-like wax. which 

 readily distinguishes it from all 

 other common species. 



Life History. — Eggs are white to 

 yellowish in color and are deposited 

 in the early summer months. The 

 species is not as prolific as many of 

 the others of this genus, and because 

 of parasites scarcely does any damage. 



Distribution. — Throughout the 

 central and southern parts of the 

 State. 



Food Plants. — Apricot, prune, 

 peach, plum, cherry, pear, apple, 

 walnut, laurel, ash, birch, sycamore, 

 cork-elm, grape, rose, orange, logan- 

 berry and hawthorn. The branches 

 are usually the parts attacked. 



Control. — Same as for European 

 fi'iiit scal(> ( Lrcaniu>n corni) 



Natural Enemies. — Comys fiisca 

 and at least two other internal para- 

 sites were bred from this species, and 

 keep it in complete subjection. 



