CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 297 



The grub of Asaphes decolor atiis is above ^^4 inch long, with an oval 

 apical notch on last segment; dark waxy yellow; matures in May- 

 June. Pupal stage lasts about 3 weeks. . 



Cryptohypnus ahhreviatus Say.^ — ^A common wireworm in Eastern 

 United States and Canada. Adult is small, %6 inch long, broad and 

 flattened; dark brown. Larva is f^ inch long, flattened, pale yellow, 

 and its caudal segment furnished with a circular notch; resembles that 



Fig. 196. — Limonius confusus. {After Walton.) 



of Drasterius elegans. Pupates in August-September; adult emerges 9 

 days later. 



Corymbites caricinus, C. tarsal-is, C. cylindriformis feed on flower 

 buds of apple and pear in Canada. 



General Life-history of Wireworms. — ^The full grown larvae change 

 to pupae in the soil in July and August. These become adult beetles 

 in about a month, but remain in the ground until spring in their pupal 

 cells. On emerging they lay their eggs in grass lands in the earth. It 

 is probable that the larval stage of most species lasts 2 years, but in 

 some species 3 or even 5 years. 



