Fes., 1912. Mammats or ILiinors anp WisconsIn— Cory. 449 
over its eyes. When a stick was held in its direct path, it avoided it 
when three or four inches away. When it wanted to rest it settled 
on one of the weights of a gas chandelier in quite an orthodox manner, 
and when a hand was stretched out to capture it, flew off again before 
it was touched.” 
Mr. Henry L. Ward tried similar experiments with another species 
(Nyctinomus braziliensis) in Mexico. He says: “With this species I 
various times repeated the experiment of Spallanzani made 200 years 
previous . . . my results were not equal to Spallanzani’s, for 
although my bats certainly showed remarkable powers of detecting 
an approach to an object, yet they occasionally would strike against 
No. 18 wire. However, I fancy that had I like Spallanzani used 
silk threads, I should not have noted this; but the wire gave an audible 
record of each touch, no matter how light it was.’”’* 
While most of our Bats hibernate in winter, there is little doubt 
that a number of our tree-dwelling species migrate to a more or less 
extent in fall and spring. Dr. C. Hart Merriam has apparently proved 
this in regard to the Hoary Bat, .Vycteris cinereus, and Silvery Bat, 
Lasionycteris noctivagans,} his evidence being largely based upon their 
occurrence far south of their breeding range in winter, and the appear- 
ance of the latter species in spring and fall at Mount Desert Rock, 
some 30 miles off the coast of Maine. Mr. Gerrit S. Miller, Jr., found 
Bats common on Cape Cod., Massachusetts, between August 21 and 
September 13, but apparently absent before and after that time,{ 
which would seem to warrant the belief that they were migrating. 
The species observed were the Red Bat, Nycteris borealis, Hoary Bat, 
Nycteris cinereus, and Silvery Bat, Lasionycteris noctivagans. Dr. 
Edgar A. Mearns says concerning the Red Bat,§ “‘It is possible that 
the species migrates to the south in autumn and returns in the spring. 
During the latter part of October and the first week of November I 
have seen great flights of them during the whole day.” Another 
account of the supposed migration of Bats is given by Mr. Arthur 
H. Howell, in which he describes seeing Bats flying over Washington, 
D. C., on the morning of September 28, 1907, a hundred or more 
being observed between 9 and 10 o’clock. They were flying singly 
at a height varying from 150 to 4oo feet (too far away to admit of the 
species being positively identified) and usually only four or five were 
in sight at one time. 
* Trans. Wis. Acad. Sci., XIV, 1903 (1904), p. 642. 
{ Trans. Royal Soc. Canada, V, Sect. 4, 1888, pp. 85-87. 
t Science, N. S., V, 1897, pp. 541-543. 
§ Bull. Amer. Mus. Nat. Hist., X, 1898, p. 345. 
{ Proc. Biol. Soc. Wash., XXI, 1908, pp. 35-37. 
