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Phyllophaga hirtlcula was also taken in all the localities given, out 
was very scarce at Gays Mills and not abundant at Madison. Considering the 
whole -of southern Wisconsin, it was next in abundance to P. rugosa and con- 
prised 32.66 percent of the total taken.. Although P. hirticula was taken 
from 22 species of hosts, it does not appear to "be so general a feeder as P. 
rugosa . It fed predominantly on "bur oak, hickory, and hazel, those hosts 
furnishing 85.1 percent of the total taken before July 1 and 7U.I percent of 
those taken after July 1. It may ho noted in the table that hickory furnished 
3.9 percent of those taken before July 1 and $1,8 percent. of those taken after 
that date, whereas bur oak furnished 73*8 percent of those taken before July 
1 and 3 percent after that date. As stated before, this change in feeding 
habits seemed to occur while bur oak leaves were becoming tough, 
Phyllophaga fusca was also taken in all districts studied. Taking 
southern Wisconsin as a whole, it was the third species in abundance. It 
is a rather general feeder and was taken from 25 species of hosts. It fed 
predominantly on cultivated cherry, bur oak, hickory, hazel, dogwood, poplar, 
and willow, those hosts furnishing 87.3 percent of the total taken before 
July 1 and 92. h percent of the total after that date. It may be noted in com- 
paring tables 2 and } that none was taken from cultivated cherry after July 1 
and that while only 9.3 percent of the total, were taken from dogwood before 
July 1, 63. U percent were taken from that host after that'' date. 
Phyllophaga tr istis. was taken from all districts studied except at 
Dane and Merrimack. It is, however, known to occur in both places. Consider- 
ing southern Wisconsin as a whole, it was the fifth species in abundance. It 
feeds primarily on oak, especially bur oak. Before the first of July ^1,Z 
percent of the total number were taken from bur oak and 3»9 percent from other 
oaks. After July 1, 82 percent were taken from bur oak and 18 percent from 
red oaks. 
P hyllophaga i mplicita was fourth in abundance in southern Wisconsin, 
It was primarily a willow and poplar feeder, but was taken from four other 
hosts. Before the first of July 86.9 percent of the total were taken from 
willow and 2.8 percent from poplar. After July 1, 93.6 percent were taken from 
poplar and 6.U percent from willow. 
Other species .~~The remaining 10 species, which together approximated 
2 percent of the total, were taken from relatively few hosts. These can be 
found in tables 2 and 3» Dogwood was the favorite host of Phyllophaga drake i 
both before and after 'July 1, and dogwood and hazel were preferred by P c , nitida . 
Most of the P. anxia were taken from willow. The seven specimens of P. spreta 
were taken -from cultivated cherry at Gays Mills. 
Any summary such as the foregoing, which gives the total percentages of 
various beetles collected from different hosts over an entire season, may con- 
ceal some of the host preferences because of the variation in population of 
certain species in different localities. Thus it is possible to collect more 
specimens of a given species of beetles from an unfavored host, where this 
species is abundant, than from a favored host where the-species is scarce. 
Much may be gained, therefore, from a careful study of each collection made in 
each district. It should be emphasized that this was done, and that the 
estimates of the host preferences and the prevalence of various species based 
on the individual collections are essentially in agreement with those based on 
the condensations given in tables 2 and 3« 
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