THE MONTHLY BULLETIN. 



73 



PiQ 58. — The green citrus louse, Macrosiplmm citrifolU (Ashm.;. 

 Adult winged and apterous females. (Essig, P. C. Jr. Ent. ) 



THE DESTRUCTIVE PEA LOUSE. 



Macrosiplium destructor (Johnson). 

 (Fig. 59.) 



General Appearance.— A large, light-green apterous arid winged 

 form, 3 mm. long. Head and thorax of winged lice amber to yellow ; 

 red spots often occur on the abdomen. 



Life History.— These lice occur practically throughout the entire 

 year. In the winter they feed upon legumes in the mountains and in 

 summer migrate to the cultivated fields. Due to their great prolificacy 

 much damage is done, especially to pea crops during the summer 

 months. In many localities entire fields have been ruined. 



