80 



THE MONTHLY BULLETIN. 



Distribution. — Throughout the entire State. 



Food Plants. — Roses, usually more serious on climbing varieties. At- 

 tacks the leaves and buds and may prevent the production of flowers. 



Natural Enemies. — Syrphid flies do considerable work upon this 

 species, but the natural enemies are not numerous enough to check 

 the ravages until late in summer. 



Fig. 63. — V^alnut plant louse, Chromaphis juglandicola (Kalt.). A, adult winged 

 viviparous female ; B. adult apterous viviparous female ; C, nymph of winged female ; 

 1-3, antenna of winged female; 4, cornicle (honey tube) of winged female; 5, cornicle 

 of apterous female; 6, style; 7, anal plate; 8, antenna of apterous female. (Essig, 

 M. B. Cal. Hort. Com.) 



