﻿FIELD AND FOREST. 23 



orado species, he will be interested to know what other species are 

 destructive to the potato, and in like maimer, he will learn the history 

 of Lema triliniata, Baridius ttinotatus, Coptocycla clavata, and other 

 species. When an insect is a general feeder it may be shown in the 

 cases devoted to two or three only of the plants it is most destructive to, 

 though on the card label, (which should be at least an inch by two 

 inches in size,) the other plants it feeds upon should be named, or if 

 found on vegetation generally, the word "omnivorous" explains the 

 fact. 



In the present collection the first stages of many insects could not 

 be shown, and in some cases the insects themselves were wanting, and 

 so were supplied by water color drawings executed by Mr. F. G. San- 

 born, to whom was given the work of arrangement. 



The design of arrangement has not been as fully carried out as could 

 be desired, chiefly for want of specimens, particularly those il- 

 lustrating the early stages of the insects. The present collection 

 though, is a commencement, forming the nucleus of what may, some 

 day, be the full realization of a complete cabinet of Economic Ento- 

 mology. We think the plan of arrangement is new, and may become 

 useful in an educational point of view, though it should be accompa- 

 nied, ii colleges and institutions, by a working collection, arranged 

 according to families, tribes, genera and species, in order that the stu- 

 dent may familiarize himself with classification while studying the 

 habits of insects in relation to our farm products. The groups ex- 

 hibited are as follows: 



Case A. Thirty-nine species of the insects destroying, either 

 directly or indirectly, the root, stalk, foliage or fruit, (in the field and 

 in the granary, ) of Indian corn or maize. 



Case B. Insects destroying, or proving injurious to wheat, rye, 

 oats, and other cereal crops. Twenty-two species. 



Case C. Insects destroying or injuring cotton. Thirty-three species. 



Case D. Insects destroying or injuring the potato. (Solatium 

 tuberosum.) Sixteen species. 



Case E. Insects proving destructive to Cucurbitaceous plants, as 

 cucumber, squash, melons, &c. Seven species. Insects destroying 

 milkweed, &c. Twenty- five species. 



Case F. Insects destroying cabbage, turnip, &c, or the plants of 

 the kitchen garden. Twenty-eight species. 



