Plate XXI 



Fig. 1. Red Locust-mite, Trombidium locust arum : 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; /;, striations on the larval skin; c and d enlarged as 

 indicated. (Riley, Rep. U. S. Enr. 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 (/rand is. (After Felt, Mem. N. Y. State 

 Mus.) 



