THE MONTHLY BULLETIN. 



79 



Malva parviflora L.. and tomatoes. It has also been reported as feed- 

 ing upon the folloAving plants : Amsinckia spectahilis F. & M., Brassica 

 oleracea (cabbage, cauliflower), celestial pepper {Capsicum annuum var. 

 abhreviatum Fing.), Chrysanthemiim indicmn L., Cynoglossum sp., 

 carnation {Dianthus caryophyllus L.), English ivy {Hedera helix 

 L.), plum {Primus domestica L.), peach (P. persica B. & H.), ground- 

 sel {Senecio vulgaris h.) , Sonchus asper Vil, HoncUus oleraceus L., 

 nettle {Urtica urens L.), Prunus amygdalus, cherry (P. cerasus h.), 

 German ivy, Pruuus insititia, Malva rotundifolia. 



Natural Enemies. — Internal parasites and predaceous enemies usu- 

 ally make it unnecessary to adopt artificial methods of control. 



SMALL GREEN ROSE LOUSE. 



Myzus rosarum Walk. 

 (Fig. 62.) 



General Appearance. — A very small species, not nearly as large as 

 MacrosipJium rosw ; green throughout except dark markings on the 

 winged forms. It is often mistaken for the larger species. 



Life History. — A very serious rose pest at times, and especially bad 

 in the summer months. It breeds very rapidly, collects in great num- 

 bers upon the leaves and excretes a great amount of honeydew which 

 smuts the bushes. The worst rose pest in many parts of the State. 



Fig. 62. — Small green rose louse {Myzus rosarum Walk.). A and B, adult females; 

 1 and 2, antennal articles, 3, cornicle, 4, style, 5, third antennal article of winged 

 female; 6, style, 7 and 9, front and antenna, and 10, cornicle of apterous female. 

 (Essig, P. C. Jr. Ent.) 



