6 COMMON WHITE GRUBS. 
: 
Infestation occurred, however, as far west .as Tabor, S. Dak., 
and though no serious general injury was found west of eastern 
Towa there were scattered occurrences in western Iowa and 
southern Minnesota. Throughout the southern third of Wis- 
consin and in northern Llnois the grubs were abundant, espe- 
cially in the western portions of those sections. Many infestations 
were also reported from southern Michigan and scattered ones from 
northern Indiana and eastward through Ohio. These infestations 
again became general in northeastern Pennsylvania, southeastern 
New York, in Connecticut, and 
in parts of New Jersey. 
In the worst infested dis- 
—tricts it was not at all unusual 
to find from 40 to 60 grubs in 
a single hill of corn. Indeed, 
in a cornfield near McGregor, 
Towa, devoted to timothy the 
previous year (1911), Mr. R. L. 
Webster and the writer found 
seventy-seven 2-year-old grubs 
in an area 24 feet square and 5 
inches deep. This really rep- 
resented less than a single hill 
of corn, for the hills in this 
field were 35 feet apart. 
From a personal survey of 
the infested territory made in 
1912 in Iowa (fig. 4), Wiscon- 
sin (fig. 5), and Illinois (fig. 
6), as well as from reports of 
farmers and others, we have a 
Fic. 2.—Typical examples of May beetles: a, Very conservative estimate of 
Tachwotterna oreuteta: b, Eaehwasto™s the damage to corn, timothy, 
and potatoes in these States, 
aggregating not less than $7,000,000. The damage to the same crops 
in the other infested areas can not be figured at less than $5,000,000, 
which brings the total loss in 1912, exclusive of strawberries, nursery 
stock, lawns, and miscellaneous crops, to not less than $12,000,000. 
POSSIBILITY OF AN OUTBREAK IN 1915. 
Available records show that May beetles were unusually abundant 
in 1908, the grubs causing considerable damage in Wisconsin, Llinois, 
and other localities in 1909 and again in 1912. The damage, however. 
was more pronounced in these localities in 1912. As previously 
noted, the beetles were very abundant in the spring of 1911, thus giv- 
ing rather conclusive evidence that the life cycle of the more abun- 
543 
