THE NUMBER OF YOUNG OF THE RED BAT. 
HENRY L. WARD. 
At the March meeting I presented before the Society a 
mounted specimen of the Red Bat, Lasiurm borealis, with four 
voting, calling attention to a previous record, by M. W. Lyon, 
Jr., in Proc. U. S. Nat. Mus. Vol. 26 pp. 425-42G, of this number 
of young for this species, the article also containing: an account 
of the numbers previously recorded i. e. two having two young 
and two having three young. 
In "Science" N. S. Vol. XXII No. 549 (July 7, 1905) pp. 20- 
21, I gave a resume of the observations then made, including 
four by myself, and requesting records from others. 
Prof. John L. Sheldon of the Agricultural Experiment Sta- 
tion, Morgantown, W. Va., writes me that when teaching in the 
Nebraska State Normal School in 1900 some boys brought him 
a red bat, "as I called it, in distinction from the much darker 
brown ones, with three young attached to her. The young were 
about half grown." 
Mr. Clyde Fisher, assistant in Biology and Geology in Miami 
University, Oxford, Ohio, writes me under date of July 17th : "A 
few days ago I found several red bats (Lasiurm borealis) hanging 
head downwards, by their hind claws, in trees between the gutter 
and the sidewalks along the streets of our town. I succeeded in 
capturing a female with three young clinging to her." 
Recently in overhauling some alcoholic specimens in the 
basement of the museum an unrecorded preparation of a female 
Red Bat with four young was found, the label stating that they 
were taken "early in July, 1899. Donated by H. A. Kirchner." 
As the data stood in my notice in "Science," the recorded 
numbers of cases with their respective number of young was 2x1, 
2x2, 3x3 and 2x4. Adding the above mentioned cases to these 
we have the revised count 2x1, 2x2, 5x3 and 3x4. While these 
twelve records are far short of what are required for satisfactory 
generalization they yet have altered the facies of the former tabu- 
lation and we now find that four young are more common than 
is a number smaller than three, of which latter number the table 
shows a greater preponderance than before. 
In "Science" I adverted to the possibility of a bat losing one 
or more of her young by death or by their accidentally becoming 
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