THE MONTHLY BULLETIN. 



127 



Food Plants. — This species attacks a very large list of plants, though 

 it has never yet become a serious pest to any horticultural or agri- 

 cultural product. The food plants reported in California are Acacia, 

 Baccharis pilularis, camellia, camphor, Ceanothus, Cercis sp., Cissus 

 sps., quince, Dioscorea, sp.. Erica sp., eucalyptus, euonymus, fuchsia, 

 English ivy, mountain holly, walnut. Lavatera sp., umbrella tree, 

 myrtle, olive, passion vine, mistletoe, pittosporum, cottonwood, almond, 

 cherry, pomegranate, pear, apple, rose, willow, Salvia sp., Seduni sp., 

 nightshade, Strelitzia sps., California bay or pepperwood and grape. 



Natural Enemies. — An undetermined internal parasite has been 

 bred from this species. 



IVY OR OLEANDER SCALE. 



Aspidiotus hederw (Vail.). 

 (Figs. 110, 111.) 



General Appearance. — Circular flat scale, one sixteenth to one 

 eighth of an inch in diameter, the male scales being very much smaller. 

 The color varies from light to dark gray. On lemons this species often 



Pig. 110. — The ivy scale (.Aspidiotus hederw Vall.) on Englisli ivy leaf. (Original.) 



appears quite red and is occasionally^ taken for red scale (CJirysom- 

 pJtalus auraiitii), but the lack of the small, central dark exuvife together 

 with its smooth, flat surface makes it easily distinguishable from red 

 scale and also from the greedy scale {Aspidiotns camellice) , which is 

 decidedly pointed. 



