PEA AND BEAN INSECTS 67 



The Grape Colaspis 



Colaspis hru7inea Fabricius 



This insect occasionally riddles the foliage of beans with 

 holes, its work being similar to that of the bean leaf-beetle. The 

 foliage of beet, cantaloupe and potato is sometimes eaten. 

 The beetle is about yg i^^^^h in length, uniform yellowish brown 

 with the wing-covers distinctly striate. The larvae are found 

 on the roots of strawberry, corn, timothy and other grasses. 

 They are white with the head and cervical shield yellowish 

 and i to 1^ inch in length. They reach maturity in May or 

 June and pupate in earthen cells. The beetles are common 

 throughout the summer but are most abundant in June and 

 July. The insect is generally distributed throughout the 

 northern states and Canada east of the Rocky Mountains. 



In case the beetles become sufficiently abundant to threaten 

 serious injury, they may be poisoned by spraying the plants 

 with arsenate of lead (paste), 2 or 3 pounds in 50 gallons of 

 water. 



References 



Forbes, 13th Kept. State Ent. 111., pp. 156-159. 1884. 

 Forbes, 22ud Rept. State Ent. 111., pp. 145-149. 1903. 



The Bean Ladybird 



Epilachna corrupta Mulsant 



In the foot-hills from Wyoming through Colorado to Arizona, 

 New Mexico, Texas and Mexico, bean plants are sometimes 

 seriously injured by one of the ladybird beetles. The insect 

 also occurs in western Kansas. 



The bean ladybird passes the winter in the adult condition. 

 In New INIexico the beetles appear in the field from early June 

 to the middle of July. The beetle (Fig. 48) is about -g- inch in 



