MICHIGAN ACADEMY OF SCIENCE. 
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dreds. Other species, in more limited numbers, were Cculosoma scrutator 
Fab., C. GaUdmn Fab., and Carabus marauder Fisch. (which appeared in 
July). 
Dytisckhe were found in the washup crawling on the sand and under 
boards and logs. Many species of Curculionkhe were found on boards, 
logs and rocks, in some cases fifty or more individuals of the same 
species occurring above and beneath the same ten-foot board. Several 
species of Cocciuellidae, such as Hippodarnia parenthesis Say, congre- 
gated in such numbers on some of the rocks and logs as to make the 
latter look reddish at a little distance. 
To summarize, then, the conditions on this shore (northeast), great 
numbers of beetles were found on and under boards and logs, on the 
rocks and large stones, in the rock pools and by beating the foliage of 
the trees and shrubs near the shore line. Among them were the fol- 
lowing groups : Carabidae, Elateridae, Dysticidae, Scarabaeidae, Coc- 
cinellidae, Curculionidae, all in great numbers and varieties of species, 
Tenebrionidae and Buprestidjge in lesser numbers and species on top of 
boards and logs and Staphylinidae and others in still lesser numbers and 
species underneath boards and debris. 
The writer believes that most of the Ooleoptera found on the beach and 
shores are species that breed on the Island. These beetles, presumably, 
fly out at night over the water until exhausted and then drop, the 
waves washing them back on the beach, in most cases not much the 
worse for their experience. Coleoptera were most common on this shore 
(northeast), when the wind and waves were coming from the direction 
of Lake Huron. This would mean that, if the beetles were blown from 
other shores, they would be in the water a number of days and conse- 
quently not active and able to take care of themselves. But, on the 
contrary, they were mostly very active, which presumably indicates that 
they had not been in the water any great length of time and had not 
drifted for any distance. For instance, the writer found three speci- 
mens of Acmaeops proteus Kirby, on a log within a space of one foot. 
They were the only ones found on the Island, and it is not at all likely 
that they could float for days and then land together. The Lachnost- 
erna, being night fliers, were found in great numbers, both dead 
and alive, on the shore and beach, the living in many cases making cells 
in the sand under boards and logs. The rare, Laclmostcrmi albina 
Bunn., was found in some numbers, this being the first record for 
Michigan. Furthermore in the washup few beetles were found that 
could not live under the conditions as they existed on the Island. Since 
no trees are felled on the island, very few species of Buprestidae, 
Cerambycidae, Gleridae, etc., were found. This was because the absent 
species require freshly cut timber and stumps or drying logs. Some 
that were found on the beach were mostly badly decayed, showing that 
they had come from some distance. 
On the southwest shore the conditions differ much from those of the 
northeast shore. Very few species of the above groups were found. This 
was apparently partly because this shore was not so favorable for active 
movement, a more or less wide stretch of dry, loose sand between the 
shingly beach and the edge of the woods and shrubbery preventing the 
beetles from crawling or running freely; and it was probably partly 
