48 
BULLETIIS' 216, U. S. DEPAETMENT OF AGEICULTUEE. 
Total 
length 
of life. 
?5 
Date of 
death or 
disappear- 
ance. 
■ ■ • 
; i 
1 
Aug. 18. . . 
Sept. 19... 
Nov. 14... 
Largest 
num- 
ber of 
young 
m one 
day. 
Aver- 
age 
young 
per day 
of pro- 
ductive 
period. 
: + 
: ^ 
3.0 
3.4 + 
1.5 + 
Num- 
ber of 
young. 
!■ 
: § 
Life 
after 
last 
young. 
• <N 
Repro- 
duction 
period. 
; n 
: 
Date of 
last young. 
May 22 
June 2 
June 1() 
June 23 
July 3 
July 5 
July 14 
Aug. 1 
Aug. 14 
Aug. 8 
Sept. 1 
Sept. 12 . . 
Sept. 20 
Nov. 6 
Nov. 21, 
Dec. 15-22... 
Dec. 8 
June 28 
Aug. 17 
Sept. 15 
Oct. 17 
Age at 
birth 
of first 
young. 
Date of 
first 
young. 
Date of birth. 
May 22 
July 31 . 
Aug. 17 1 
Sept. 15 .. 
Oct. 14-16... 
!l 
1-1 c<) CO ^ 5C oc 03 o CO « ^ 00 05 ^=^'^2^^ 
