32 
Psyche 
[February 
when examined in the spring, mostly the work of woodpeckers. 
Of the remaining fifteen experiments one was destroyed by an 
over-anxious farmer, one was partly destroyed by a tractor and 
the others showed only very slight traces of feeding by birds or 
no evidence of bird feeding whatever. Table Number 1 shows 
the extent of bird feeding on the five experiments attacked, and 
the recovery of larvae from stations that escaped noticeable 
bird feeding. The average recovery of larvae from experiments 
not attacked by birds was 1,090 larvae per station as compared 
with the average expectancy of 1,223.2. This apparent loss of 
10.8 per cent of expected larvae per station was undoubtedly 
TABLE I 
Extent of Feeding by Birds on Experimental Material in the Spring of 1923 . 
Experiments on which birds fed. 
<v 
1 
>.1 §11 
- .b 0 a <v 
Location 
e placet 
1922 
recover 
1923 
. larvse 
pected 
> £ 
U <D 
43 > 
0 
3 parent 
loss 
0^ <0 
C Id c 
Jv CU S- O U 
4, O » a- 
I’S 
d 
Q 
<D 
CTj 
Q 
0 x 
£ 
6 cj 
£ 
< 
b -b 
$ 1 1 > § 
Oh <j ctJ 0 
Cb rt.S m 0 
Scituate, Mass. 
XI-3 
IV- 1 1 
906 
123 
783 
86% 
84 % 
Newbury, Mass. 
XI-10 
IV- 1 4 
1289 
214 
1075 
83% 
81% 
Rockport, Mass. 
XI-10 
1V-I2 
1289 
209 
1080 
83% 
8l% 
Medford, Mass. 
X-25 
IV-9 
1289 
390 
899 
69% 
66% 
Arlington, Mass. 
XI-2 
IV -9 
809 
576 
233 
27% 
12% 
Experiments on which birds did not feed. 
I 
Bristol, N. H. 
XI-8 
1V-29 
1289 
1397 
Framington,N.H. 
XI-7 
IV-2 9 
1289 
1341 
Wells, Me. 
XI-7 
IV-28 
1289 
1132 
Concord, Mass. 
XI-4 
IV-io 
809 
854 
Falmouth, Mass. 
X-31 
IV - 7 
1289 
1135 
Quincy, Mass. 
XI-4 
IV- 1 1 
906 
944 
Harwich, Mass. 
XI-i 
IV- 6 
1289 
„ 909 
Methuen, Mass. 
XI-2 
1V-14 
1289 
T014 
Manomet, Mass. 
X-30 
iV-6 
1289 
1081 
Tyngsboro, Mass. 
XI 8 
[V-14 
1289 
990 
Wareham, Mass. 
Xf-I 
IV-8 
1289 
io 56 
Wellfleet, Mass. 
X-31 
IV- 7 
1289 
1106 
Worcester, Mass. 
X-26 
IV-II 
1289 
1222 
