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Phyllophaga hirticula was taken from 21 kinds of plants. Hazel 
supplied H9.3O percent of the total number of beetles taken. Hickory, oaks 
of the red oak group, bur oak, and walnut yielded 20.27, 8.32, 8.11, and 
U,58 percent, respectively, and together with hazel, 9°»52 percent of the 
total, 
Phyllophaga fusca was taken from 27 species of host plants. Butternut, 
bur oak, hazel, hickory, oaks of the red oak group, aspen, and dogwood supplied 
18. 6l, 13,52, 12.35, 12,35, 8.78, 8. 78, and 7.55 percent of the total, respec- 
tively, and together. 81,9^ percent, A diversified feeding habit was indicated 
in 1937i as in 1935 and 1936, This species did not feed heavily on cultivated 
cherry, as- it did in 1935* 
Phyllophaga rugosa was taken from 21 kinds of host plants. Cultivated 
cherry at Gays Mills supplied ^5«90 percent of the total beetles of this species. 
Hickory, butternut, hazel, poplars other than aspen, ironwood, and aspen yielded 
11,01, 10.13, 5.91, 5.10, U.21, and 3.25 percent of the total, respectively. 
Together with cherry, these hocts yielded 85*51 percent of the total. 
re taken at Gays Mills, This 
hazel, butternut, hickory, and 
3,62 percent of the total, 
M st of the Phyllophaga ilicis adults r. 
species was takon from 17 kinds of host plants, . 
pignut hickory yielding U3.U3, 26,10, 12.95, and 
respectively, and together 86,10 percent, 
Phyllophaga implicita was found throughout southwestern Wisconsin but 
was rather scarce at Gays Mills, It was collected from 11 kinds of host plants. 
Willow and aspen yielded 5I.H9 and 35»07 percent, respectively, and together 
86.56 percent of the total. 
Summary of collections,' 1935 to 1937, inclusive 
Since the population of various species of June beetles varies among 
the different broods, it is desirable to summarize the populations of the 
various species on the 3~y e ar basis. 
Table 8 shows the number of each species of beetle taken, each year 
during the period 1935-37, inclusive, the total number of beetles of each 
species for the 3-year period, and the percentage of the grand total of 
beetles represented by each species, Pbyllor.ha.ga rugosa and P. hirticula 
were taken in about equal numbers, these two species constituting 67,15 per- 
cent of the total, P. tristis was probably as abundant as either of these 
two species, but in 1936, when they were most abundant, they were more numerous 
in areas where tall oaks predominated; consequently no samples of value could 
be taken. In 1937 £. ilicis was among the six most abundant species, including 
P, tristis. but in other years it had not been important. 
