68 ~ 
Table 1. June beetles taken from host plants in 1941 
Species 
At 
Gays Mills 
.. . . . 
Prom areas other 
than Gays Mills 
Total 
Humber 

Humber 
Humber 
P. hirticula ....... 
192 
1,986 
2,178 
P. fusca 
706 
1,342 
2,048 
P. rugosa 
1,421 
540 
1,961 
P. balia 
122 
12 
134 
P. ilicis 
48 
49 
97 
P. tristis 
10 
77 
87 
P. futilis 
0 
32 
32 
P. drakei 
1 
31 
32 
P. nit-ida 
1 
30 
31 
P. implicita 
2 
28 
30 
P, prunina 
3 
25 
28 
P. marginal is 
2 
10 
12 
P. crenulata 
0 
21 
21 
P. anxia 
0 
11 
11 
P, inversa 
1 
0 
1 
Total 
2,509 
4,194 
6,703 
From areas other than Gays Mills, 14 species were taken. rj -’hese included 
11 of the 12 species collected at Gays Mills and 3 others — P hyll op haga futilis 
Lee., P. crenulata (Proel.), and £, anxia Lee, ^'he most common species, in 
a diminishing order of abundance, were P. hirticula , P. fusca , P. rugosa, P, 
tristis , and P, ilici s. P. hirticul a, P. fusca , and P. rugosa m ade up 47.35, 
32.00, and 12.88 percent, respectively, of the total number of beetles taken, 
and altogether coratituted 92.25 percent. The actual numbers of all species 
taken from areas outside the Gays Mills area, as well as the total numbers of 
beetles of each species taken in a.ll areas, are given in table 1. 
Host Preferences of the Beetles 
In the Gays Mills area Phyllophaga rugosa was collected from 22 kinds 
of plants, 9 of which yielded 86.34 percent of the total. P. f usca was 
taken from 20 kinds of plants, 4 of which yielded 86.68 percent of the total. 
P. hirticula was taken from 10 kinds of plants, 4 of which supplied 89.58 
percent of the total. P, balia was also taken from 10 kinds of plants, 4 
of which gave 86.69 percent of the total, P. ilicis was taken from 9 kinds 
of plants, 5 of which supplied 85.42 percent of the total. The principal 
hosts of these sj)ecies and the percentage of the total furnished b?/ each 
are given in table 2, 
