232 MANUAL OF VEGETABLE-GARDEN INSECTS 



from the contents of the alimentary canal. It differs from the 

 white grub (Lachnosterna) in its shorter and more robust form, 

 in the shorter legs and smaller head, and in its habit of crawling 

 on its back. In July the larvae pupate within earthen cocoons 

 of a somewhat angular external form. The beetles emerge 

 during August and September. There is only one generation 

 a year. 



Hand-picking of the beetles is apparently the most practicable 

 means of controlling this insect when it is found working on 

 sweet corn. 



Stink-Bugs 



Two species of stink-bugs, KuschiMus mriolarms Palisot de 

 Beauvais and E. cuscMdoldc.s Snellen van Vollenhoven, some- 

 times injure sweet corn by puncturing the 

 kernels through the husk. They suck out 

 the juice, causing the kernels to become 

 sunken or to pop open. The injured 

 kernels become infected with mold. 



These stink-bugs are about | inch in 

 length, dull grayish 

 brown, sometimes tinged 

 with reddish or greenish 

 and dotted with numer- 

 ous black punctures. In 

 E. mriolarms (Fig. 141) 

 the sides of the pro- 

 thorax are acutely pointed, while in E. 

 euschistoides (Fig. 142) they are rounded. 

 In the male of the former, there is a dis- 

 tinct black spot on the underside of the last 

 abdominal segment. 



The first mentioned of these bugs has also been recorded as 

 injuring tobacco, raspberries, peaches and strawberries. It has 



Fi(J. 141. — Euschis- 

 tus variolarius, adult 

 (X2). 



Fig. 142. — Eu.scfn'.stus 

 euschistoides, udult 

 (X2). 



