138 NORTH AMERICAN INSECTS. 



at rest, are disposed like a slanting roof. Their color 

 is generally bright green, which after death, soon 

 changes into a dingy yellow, but may be preserved by 

 taking out the intestines of the animal and filling the 

 abdominal cavity with cotton. 



Dr. Harris, in his work on the injurious Insects of 

 Massachusetts, and Mr. Westwood, in his " Introduc- 

 tion to the Modern Classification of Insects," differ from 

 me, and call the first family Locustida?, and the second 

 Grillidse, probably in order to harmonize with the En- 

 glish translations of the Bible, 



According to my classification, an illustration of the 

 Grillidas is seen in the Carolina Grasshopper, Gryllus 

 Carolina, Plate V. Fig. 22, and of the Locustidre in the 

 Katy-did, Platophyllum Concavum, Harris, Plate V., 

 Figs. 23, 24 and 25. 



The Grasshoppers embrace a numerous variety of 

 different genera and species, all of which may be seen 

 in their perfect condition at the beginning of autumn. 

 At the same season, also, the females deposit their 

 eggs, from fifty to one hundred each, some in holes in 

 the ground, others fasten them with a glutinous sub- 

 stance upon different kinds of leaves. From these 

 eggs proceed, in the following spring, the young Grass- 

 hoppers, which exactly resemble the perfect insect, ex- 

 cept in being destitute of wings, and these are not de- 

 veloped until towards the end of summer, when they 



