THE MONTHLY BULLETIN. 



133 



longer. Like other coccids the males are winged and so small as to be 

 scarcely observed. The females settle on the trunks, limbs, foliage 

 and fruit, and cause great damage. Trees may be entirel}^ killed by 

 their attacks. It is one of the most serious pests known to citrus fruit 

 culture. 



Distribution. — Throughout the southern citrus belt, and particularly 

 bad in sections of San Diego, Orange, Los Angeles, Eiverside, San Ber- 

 nardino and Santa Barbara counties. 



*.\j 







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^1 • 



Pig. 116. — Large portion of orange tree killed by two 

 years' Infestation of reil scale, Chrysomphalus auranUi 

 (Mask.). (After Quayle, Courtesy Cal. Exp. Station.) 



Food Plants. — All citrus trees, camphor, tig, olive, rose, pear, plum, 

 apple, quince, willow, oak. grape, acacia, tea plant, wattle, sago palm, 

 nightshade, English walnut, Eucalyptus, passion vine, date palm, Call- 



