470 OHIO EXPERIMENT STATION: BULLETIN 332 



PLATE LXX 





Fig. 1. The Maple and Oak Twig Pruner (Elaphidion villosum). a, 

 and c show the insect in the larval, adult and pupal stages; d and e, the cu 

 ends of a severed twig, and f , the pupa within a gallery in the severed twig. 



After Chittenden. 



Fig. 2. The Bronze Birch Borer (Agrilus anxius). Larva and adult en 

 larged about three diameters. 



After Chittenden. 



Fig. 3. The Pigeon Tremex (Tremex columba). Larva, adult and pupa 

 Slightly enlarged. 



After Riley. 



