Plate XXI 



Fig. 1. Red Locust-mite, Tromhidium lociistamm : a, mature larva on 

 wing of locust ; b, pupa ; c, adult male ; d, adult female ; e, 

 pupal claw and thumb ; /, pedal claw ; g, one of the barbed 

 hairs ; h, striations on the larval skin ; c and d enlarged as 

 indicated. (Riley, Rep. U. S. Bnt. Comm.) 



Fig. 2., The same : a, female with her eggs ; b, newly hatched larva (nat- 

 ural size indicated by dot within the circle) ; e, egg; d and 

 e, empty egg-shells. (Riley, I.e.) 



Fig. 3. White-faced Hornet, Vespa maculata. (J. B. Smith, Ins. of 

 N.J.) 



Fig. 4. Ground-beetle, Lebia grandis. (After Felt, Mem. N. Y. State 

 Mus.) 



