to our house fly, but larger, and having a more hairy body, destroys the per 

 fect insect of the Mantis, or rear-horse, as many as nine having come out 

 of the body of one Mantis Carolina, (PI. II, Figs. 1, 2, 3.) An Ichneumon- 

 fly destroys the eggs of katydids. Crickets, grasshoppers and katydids 

 are infested with the Filaria, Gregarina and Gordins, hair-snakes, or worms, 

 which live in their bodies. A small scarlet-red mite Astoma locustarum 

 (WALSH) or Ocypete of HARRIS is frequently found clustered on the body or 

 under the wings of grasshoppers, and it is said that when numerous, they 

 eventually kill the insect they infest. In late summer and autumn great 

 numbers of dead and dried-up grasshoppers are frequently observed in Ma 

 ryland and Virginia, clinging fast to the tops of the highest stalks of grass 

 or weeds. These probably have been destroyed by some animal or vegetable 

 parasite, at present unknown. 



Many of the so-called dirt-daubers, mud and sand wasps, provision 

 their neste with young grasshoppers to serve as food for their larva, and 

 there is no doubt that when more attention is given to the habits of our 

 Orthoptera, many other parasites especially among the Ichneumon-flies, Chal- 

 'ididea, &c., will be discovered and made known to the public. 



