52 



THE MONTHLY BULLETIN. 



Natural Enemies.— While many of the natnral enemies previously 

 listed do much work upon this species they are no great factor in its 

 control. 



Fig. 42. — The woolly buttercup louse {Pemphigus calif ornicus Davidson). A, 

 winged female ; B, apterous female ; C, antenna of winged female ; E, fourth and 

 fifth and F, third antennal articles of winged female ; D, antenna of apterous female ; 

 G, tarsi; 1, style; 2, lateral and 3, front view of lateral tubercle of compound eye. 

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



