43° 
The Ohio Naturalist. 
[Vol. IX, No. 3, 
the results obtained. Professor J. S. Hine gave the use of his 
private collectionjand also offered many valuable suggestions. 
Miss M. M. Haskins, of Toledo, Ohio, continued the observations 
atjthe Lake Laboratory for some time after August 1st when the 
writer left. Thanks are also due Mr. R. J. Sim for the observa¬ 
tions made upon Disonycha pensylvanica pallipes, which he 
kindly furnished, and which are included in the present treatise. 
BIBLIOGRAPHY. 
1. Chittenden, F. H.—Bui. 43: Div. Ento. U. S. Dept. Agr. 
Dec., 1903: pp. 14. 
2. -Bui. 18: N. S. Div. Ento. U. S. Dept. Agr. 1898: 
pp. 83-85. 
3. -Bui. 19: N. S. Div. Ento. U. S. Dept. Agr. Apr. 
1899: pp. 80-85. 
4. -Proc. Ent. Soc’y. Wash. Vol. 2. June 27, 1892: 
pp. 261-267. 
5. Murtfeldt, M. E.—Bui. 22: Div. Ento. U. S. Dept. Agr. 
1890: pp. 73-84. 
6. Bruner, L.—Bui. 14: Neb. Agr. Exp. Sta. June, 1890: pp. 
11, 149. 
7. Garman, H.—2nd Ann. Rept., Ky. Agr. Exp. Sta. 1889 
(1890): pp. 8-31. 
8. -Agr. Sci. Vol. 5, June, 1891: pp. 143-145. 
9. Forbes, S. A. & Hart, C. A.—Bui. 60, Ill. Agr. Exp. Sta. 
Oct. 1900: pp. 97, 523. 
10. Howard, L. O.—Bui. 30: N. S. Div. Ent. U. S. Dept. Agr. 
Oct. 1901: pp. 97-98. 
11. -Bui. 18: N. S. Div. Ento. U. S. Dept. Agr. 1898: 
pp. 99-101. 
12. Osborn, H. & Gossard, H. A.—Bui. 15: Iowa Agr. Exp. 
Sta. 1891: pp. 255-273. 
13. Felt, E. P.—5th Ann. Rept. N. Y. Com. Fish, Game & 
Forests 1901 (1902). pp. 351-379. 
14. Pettit, R. H.—Bui. 180: Mich. Agr. Exp. Sta. March, 1900: 
pp. 117-141. 
15. Sanderson, E. D.—New York, 1902: pp. 295. 
16. Horn, Geo. H.—Trans. Am. Ent. Soc’y. Vol. 16: pp. 200. 
