170 
THIRTEENTH REPORT. 
owing to the direction of the winds, although this was not worked ont. 
Chrysomelidae, Cerambvcidae, Elateridae and Cnrculionidae were 
found in the willows, shrubs and trees growing at a short distance par- 
allel with the southwest shore. They were also found on the pines and 
oaks, meadow roses, Rosa blanda Ait., milkweed, Asclepias syriaca L., 
and on other plants, by searching the tiowers or beating the foliage and 
branches. In a few fungi found in the vicinity of the southwest shore, 
a number of species of fungus beetles were also discovered. 
In the water, mud and matted duck-weed, Spirodela polyrhiza L., of 
the pond near the southwest shore, a number of species of Dytiscidae 
were found by dredging. Several species of Gyrinidae were swimming 
in numbers on the surface. On the lily pads, several species of Donacia 
were to be seen. 
On a sandy path near this shore (southwest), the larvae of Cicindeli- 
dae had pits. These were probably the larvae of C. repanda , as the adult 
of this species was taken there. 
In the interior of the island Coleoptera were scarce. A number of 
species of Cerambycidae and others were taken on blossoms of flowering 
shrubs. Xylorctes satyrus Fab. found crawling on the ground, and a 
number of species of bark beetles and Staphylinidae comprised about all 
the forms noted in this locality. The other shores also did not yield 
many beetles either in species or in numbers, although seemingly favor- 
able. 
Very few potato-beetles, Doryphora 10-Uneata Say, “usually very com- 
mon in the washup on lakes” were found. Nearly all were dead, but a 
number, both adults and larvae, were found feeding on night-shade, 
Solanum dulcamara L. 
The writer found Cicindelidae scarce in numbers and species on the 
island, while on the mainland, at Caseville, they were common. 
Passalus cornutus Fab. and several other species common on the 
mainland were not found at any place. 
As no domestic animals were kept on the island excepting pigs, very 
few species of dung beetles were found, none on the beach and only a 
few species near the pig-pen. These dung-beetles were common on the 
mainland. 
The lighthouse did not seem to attract beetles at all. A few were 
attracted to the window screens by the lamplight, others were observed 
on the walls of whitewashed buildings, and a number of species flew 
around at night between the buildings. A few species of Elateridae, 
Scarabaeidae and Tenebrionidae were taken in the lantern trap 
operated in the woods near the lighthouse by I)r. Newcomb. Some of 
these and other species were also taken at sugar lures on trees, namely 
Calosoma i frigidum and others. 
The following method used by the writer proved especially successful 
in taking Coleoptera on the island. Boards placed end to end on the 
damp sand, out of reach of the waves, collected immense numbers of 
beetles. The beetles coming out of the water crawled on top and under- 
neath the boards and logs, while those coming from the shrubbery and 
timber to prey on the living and dead insects on the shore and beach 
sought the shelter of these same boards and logs at the approach of 
daylight. 
April, 1911. 
