a 
96 
PROCEEDINGS OF THE NATURAE [April, 1887- 
5? left at 8:45— 
Of these 21 returned in 40 minutes. 
31 
55 left at 8:50 and 
23 “ “ 8:55— 
Of these 9 “ 
14 • . “ 
133 left at 9:00— 
Of these 61 “ 
72 
125 left at 9:05— 
Of these 36 “ 
89 
47 left at 9:10— 
Of these 1 “ 
46 
253 left at 9:15— 
Of these 52 “ 
109 
92 
106 left at 9:20— 
Of these 8 “ 
98 
109 left at 9:25— 
Of these 91 « 
18 
44 left at 9:30 and 
77 “ “ 9 : 35 -- 
Of these 22 < 
55 
227 left at 9:40— 
Of these 32 < 
77 
80 
38 
124 left at 9:45— 
Of these 57 << 
67 
150 left at 9:50— 
Of these 7 << 
98 
45 “ 
“ 45 
<< 
“ 40 
u 
. 
“ 35 
u 
“ 40 
<( 
“ 35 
u 
“ 40 
tt 
“ 35 
(i 
“ 40 
tt 
“ 35 
tt 
“ 40 
tt 
“ 35 
ll 
It will be 
“ 40 
tt 
noticed that 
“ 45 
i( 
when an un¬ 
usually large 
“ 40 
ll 
number left 
“ 45 
11 
the nest, a 
correspond¬ 
“ 45 
“ 50 
tt 
ingly large 
number en¬ 
“ 45 
it 
tered from 35 
to 45 min¬ 
“ 40 
tt 
utes later. 
“ 45 
it 
“ 40 
tt 
“ 45 
ft 
“ 50 
tt 
“ 55 
It 
“ 50 
It 
“ 55 
tt 
“ 50 
It 
“ 55 
It 
“ 60 
tt 
