180 AMERICAN MIDLAND NATURALIST. 
Mexico into Texas and thence spread slowly through the south- 
ern states. (Lugger, '00.) It was south of Virginia at the 
time of the civil war and in 1900 had reached New Jersey 
and Missouri. Since 1900, probably within the past five years, 
it has reached Indiana. It is a serious pest, eating cabbage, tur- 
nips, and other cruciferous plants, but has not yet become 
numerous enough to do much harm except in the southwest- 
ern corner of the State. 
e striped potato beetle, Leptinotarsa decemlineata, 
probably came from Mexico in the first place, but first mi- 
grated northward along the eastern base of the rocky moun- 
tains to Colorado. There were no suitable food plants on the 
plains east of that region, until they were settled and crops 
of potatoes were planted. This condition was fulfilled about 
1850 and the beetles then began an eastward migration, reach- 
aei eee ui in 1866. Since that time it has been a serious 
st. 
A number of insects have been introduced into the Uni- 
ted States from Europe and have been carried to, or have 
migrated to Indiana. 
e best known is the cabbage butterfly, Pontia rapae. 
It was introduced at Quebec in 1860 and first appeared in this 
State at Indianapolis in 1874. It was probably carried there 
by trains as the nearest point at which it was then known 
was Columbus, Ohio. 
It spread from Indianapolis during 1874 and 1875, (see 
map), reaching Tipton, Anderson, Columbus and Greencastle 
during the latter year. In 1876 the main army, migrating 
through Ohio, reached Indiana and the next year the two di- 
visions were united in the eastern part of the State. In 1876 
the species also entered the northwestern part of the State 
from Chicago, and in 1878 this colony became joined to the 
main vanguard and the species had completely covered the 
State. The principal direction of migration of this species 
. The horn fly, Hematobia serrata, which is a pest on cattle 
during the summer, and the grape berry moth, Eudémis boti- 
1886, the latter much earlier. The horn fly spread rapidly, 
reaching Indiana in about two years, and soon overspread 
all of the region east of the Rocky Mountains. The grape 
berry moth spread slowly and eached this State during the 
late nineties. 
___ The San José scale was introduced into California about 
1870. It was not discovered in the east until 1893, when it 
