74 



THE MONTHLY BULLETIN. 



A 



Pig. 59. — The destructive pea louse, Macrosiphiiui destructor (Johns.). A, adult 

 winged female; B, lateral aspect of apterous female; 1, antenna of apterous female; 

 2, antenna of winged female; 3, antenna of nymph; 4, cornicle of adult; 5 and 6, 

 cornicles of nymphs. (Essig, P. C. Jr. Ent. ) 



Distribution. — Throughout the entire State. 



Food Plants. — Peas, vetch and other legumes. 



Control. — Natural enemies do not hold this species in check at all. 

 It is sometimes necessary to spray with a tobacco or emulsion spray. 

 Such spraying can most profitably be done with a drive-geared spray- 

 ing machine. 



