48 



SNAPPING-BEETLES. 



pupae and adults are killed, at least many of them are. But the 

 younger ones are not, and as they remain in the larval stage for 

 two or three years, the fall plowing should he repeated many 

 times. Professor Smith recommends the use of crimson clover, 

 which should be sown soon after the beetles have laid their eggs, 

 and it should be harvested and plowed under so as to prevent 

 the development of the larva?. In our fruit gardens the wire- 

 worms can only be destroyed by constant attention. 



Some species also feed upon flowers and fruit, but the dam- 



Kijf. 55. — Wire worms at work. After Brehm. 



age caused by them is slight. Fig. 55 shows a click-beetle with 

 a number of larvae at work, and Figs. 56, 57 anfl 58 show the 

 adults of some very injurious species found in Minnesota. 



A few members of this family have the pleasant habit of 

 eating the eggs of our destructive locusts, hence are decidedly 

 beneficial. The larvae of Cryptohypnus bicolor Esch., which has 

 this very commendable habit, is shown in Fig. 59. 



/" A 



T6 e 



Fig. 59. — Cryptohpnus bicolor, Eseh., larva. After Riley. 



