AMERICAN MIDLAND NATURALIST. ~ 185 
6. Species valued for sport or for any animal product 
are killed and tend to disappear; not one species native of 
Indiana has been domesticate 
Species that breed slowly tend to disappear. (These 
are usually eae species with few enemies.) 
8. Species with gregarious habits are more easily killed 
than those with solitary habits, hence tend to disappear. 
The groups that tend to remain stationary or to increase 
are the following: 
1. Small species. 
2. Species that have a high birth rate. 
3. Species that have: (a) great cunning, or (b) great 
timidity. 
4. Prairie Species: there is unquestionable evidence of 
an eastward movement of the fauna, due to deforestation, and 
some indication of an unexplained northward movemen 
BIBLIOGRAPHY. 
'91. Blatchley, W. S.—A Catalogue of the Butterflies 
Known to Occur in Indiana. 17th Ann. Rep’t. Indiana State 
Geologist, pp. 365-408. 
'85. Butler, W.—Observations on Faunal Changes. 
Bulletin Brookville Society of Natural History, No. 1, pp. 5-13. 
"95. Century of Changes in the Aspects de Nature 
Proc. M Academy of ge pp. 31-42. 
Birds of Indiana. 22nd Ann. Rep't. Indiana 
State Geologist, pp. 515-1187. 
An Addition to the Birds of Indiana. Proc. Indiana 
Acad. ES 1908, p. 49. 
'07. Culbertson, Glenn.—Some Notes on the Habits of the 
Common Box Turtle. Proc. Indiana Academy of Science, 
1907, pp. 78-79. 
'08. Deforestation and Its Effects Among the Hills of 
Southern Indiana. Proc. Indiana Academy of Science, pp. 
27-37. 
'85. Eigenmann, C. H.—A Catalogue of the Fishes of 
Bean Blossom Creek, Monroe Co., Ind. Proc. ar c of 
Natural Sciences of Philadelphia, 1885, pp. 410-4 
. Forbes, S. A.— The Fishes of Illinois. Natural His- 
tory Survey of Illinois, Volume 
'09a. Hahn, Walter L.—The Mammals of Indiana. 33rd 
Ann. Rep’t. Indiana "refi Geologist, pp. 418-663. 
'09b. Bird Notes. The American Midland Naturalist. 
O, P.—The Lampreys and Fishes of Indiana. 
19th on Rep't. Indiana State Geologist, pp. 148-296. 
