THE INSECT RECORD FOR 1 90 1 



37 







course to prevent explosion 



through contact with fire. 



Simply keeping the beans 



in a cold place during the 



winter will tend to lessen 



the multiplication of the 



pests. Late sowing, also, 



appears to lessen the 



chances of injury to the 



crop. 



Late in May, Hon. Ezra 



S. Stearns sent from East 



Rindge leaves of elm in- 



, Fig. 6. The Bean Weevil: a, natural size; 



fested by an msect wnich ^, enlarged ;., beans from which beetles have 

 curled the leaves so that escaped. 

 they looked like Fig. 7.- 



This malformation is due to the presence of an aphis or plant 

 louse — the Elm Leaf Aphis. ^ Early in spring a small aphid 

 settles upon the under surface of the leaf, sucking out the sap 

 and causing the leaf to become malformed. When full grown 

 she gives birth to living young which develop beside the 



mother within 

 the curled leaf. 

 There are suc- 

 cessive genera- 

 tions until by 

 m i d s u m m e r 

 there may be 

 hundreds in the 

 colony. The 

 eijgs are laid in 

 the crevices of 

 the bark, so 

 that it seems 



probable that a winter spraying with a rather strong combi- 

 nation of kerosene and water, either in an emulsion with soap 

 or one of the kero water pumps, would destroy them. 



Fig. 7. Elm leaf injured by Aphides. 



' Schizoneura aviericana Riley. 



