162 REPORT OF NATIONAL MUSEUM, 1893. 



bowevei', from the biologic and other coHectious transferred from the Department 

 of Agriculture at or subsequent to the practical union of tlie two branches of Ciov- 

 ernment work in entomology. The expense attending the preparation of all these 

 exhibits, the securing of new cases, and the purchase of much new material, was 

 defrayed, however, from the appropriation for the Dejiartment of Agriculture. In 

 addition to the above, and to properly represent the Department of Insects in the 

 National Museum, in conjunction with the exhibits of the Department of Agricul- 

 ture, a sbowing was made in the Museum section covering a branch of the subject 

 not included in the displays in the agricultural section. This consisted of a very 

 elaborate and coiiii>lete exposition of the characteristics of the families of American 

 insects and their allies among the Arthropods. The general charge of the prepara- 

 tion of the exhil)it of the Department of Agriculture was assigned to Mr. C. L. Mar- 

 latt, who also attended to its installation at Chicago, as well as of the Museum 

 exhibit proper, which Prof. J. B. Smith was employed to prepare. Tbe exhibits of 

 the Agricultural Department and of the Museum may be described somewhat in 

 detail as follows : 



That of the Museum occupied 24 boxes of the standard Museum size, and consisted 

 of a graphic representation, by means of specimens and tigures, of the grosser fea- 

 tures of the classitication of insects and their near allies in the subkingdom Arthro- 

 poda. Included in this were illustrations of the subclasses, orders, and minor 

 groups down to and including tlie families of the classes Insecfa, Malacopoda, Myria- 

 poda, Acarida and Arachnida. In addition to sample representative exhibits with 

 each of the groups from class down to family, in many cases also with figures illus- 

 trating typical specimens or structural details, were brief but intelligent and accu- 

 rate definitions of the groups, carefully prepared and in the form of large lal)els. 

 The amount of labor thus entailed will be better appreciated from tbe fact that to 

 do this required tlie preparation of over 500 group characterizations. This exhibit 

 while not a large one in the amount of space occupied, was much more complete 

 than anything hitherto attempted of its kind, and was most instructive in repre- 

 senting and defining in small space the entire scheme of the more general features 

 of classification o{ Arthropods, other than Crustacea. 



The larger and main display in the agricultural section, representing primarily the 

 Division of Entomology of the Department of Agriculture, may be described under 

 the several sections into which it naturally divides itself, viz: (1) Injurious and 

 beneficial insects; (2) systematic and biologic entomology; (3) professional ento- 

 mological exhibits; (4) insecticides and insecticide apparatus; (5) entomological pub- 

 lications, and (6) illustrations, maps, and charts. Of these the first three sections 

 contain material drawn from the National Museum, with the addition of much new 

 and original matter; the others are entirely original, and were prepared especially 

 for the exhibit of the Division of Entomology of the Department of Agriculture. 



The economic series, namely, insects injurious to agriculture, had, as a basis, the 

 old economic material which has hitherto been exhibited at various previous expo- 

 sitions, but which, on account of its great educational value, could not well be 

 omitted. It was, however, greatly extended and made to include the results of the 

 later studies of life-histories and remedies, and was entirely remodeled and rear- 

 ranged in new cases, with new labels, and was for the most part fresh material. It 

 iiududed over 600 special exhibits of injurious species, affecting 31 distinct culti- 

 vated plants, in addition to insects injurious to live stock and household pests. The 

 number of exhibits of injurious species affecting some of the leading jjlants rei)re- 

 rsented were cabbage, 34; ai)i)le, 3."); orange, 36; cotton, 37; grape, 43; clover, 67; 

 and Indian corn, 129. Each of these exhibits gave a life-history, illustrated by 

 specimens and figures, natural enemies, together with references to the literature 

 and instruction as to remedies. In this same category conies the collection of forest 

 insects, which occupied eight standard Museum drawers, and included the principal 

 insect enemies of the leading forest trees of economic im])ortaiice. 



