134 
THIRTEENTH REPORT. 
during the fall of 1910. The raccoon lias no enemy but man on the 
island, and the keepers can regulate the number to suit the food condi- 
tions. 
7. Myotis siirblatus (Say). Say's Bat. — This species was rather com- 
mon about the light-house clearings on Charity Island and lived in 
some old buildings near the light. Nearly every evening after sundown 
one or more were seen as they flew once or twice around the light-house, 
and then down along the beach over the water or at the edge of the 
forest. On the night of September 6, a hard thunder-storm occurred 
which lasted till morning. The outside door of the workshop was left 
open, and, when the writer went to close it at daylight, eight bats, all of 
this species, were found hanging to the side of the house behind it. 
A few were seen as late as October 14, and some of them probably stay 
all winter and hibernate as they have been found to do at Ann Arbor. 
8. Lasionyctcris noctivagans (Le Conte). Silver-haired Bat. — This 
bat was often seen flying about the light-house clearing on Charity Island. 
It seemed to hunt closer to the edge of the woods than the preceding- 
species. It was not seen inside of the buildings and no doubt lived in 
the forest. There seemed to be a migration on the evening of Septem- 
ber 3, for at that time great numbers were seen in the clearing about 
the light house. Several were shot and all were of this species. Pre- 
vious to this time only one or two pair had been seen, and none were 
seen again during our stay on the island. This flight may have con- 
sisted of island individuals that had collected preparatory to migrating, 
or it may have been a movement of mainland individuals. 
9. Lasiurus borealis (Muller). Red Bat. — The red bat is apparently 
rare in the Charities as only a few were seen. Single specimens were 
shot on August 23 and 27, as they were' flying about the light house 
clearing on Charity Island. 
Ann Arbor, Mich., April, 1911. 
