PLATE 12 

 Opius humilis: 



A, B. — Dead larva in first instar; killed by first-stage larva of Diachasma iryoni, 

 showing cut on body made by the attacking larva and mandibles extended in final 

 death struggle. X loo. 



C. — Dead larva in first instar; killed by first-stage larva of Diachasma tryoni. The 

 point of attack is here clearly seen. The body contents have been apparently with- 

 drawn from the lower portion of the body by the attacking larva. X loo. 



D. — Dead larva in first instar: badly lacerated and distorted by attack of first-stage 

 larva of Diachasma tryoni. In this case the dead larva was probably destroyed while 

 n the embryouic stage and a few hours prior to the hatching of the egg. X loo. 



