14 BULLETIN 901, U. S. DEPAETMENT OF AGRICULTURE. 
On leaves of the Concord grape and similar varieties the larva 
feeds on the upper surface, leaving narrow, iiTegular, chainlike feed- 
ing marks, much narrower and less continuous than those of the 
larger species. On these varie- 
Table XII. — Incubation period of A. 
woodsi, North East, Pa., 1916. 
Date of 
Date of 
Number 
Duration 
oviposi- 
tion. 
hatching. 
of eggs. 
of period. 
June 10 
June 23 
2 
Days. 
13 
10 
25 
4 
15 
10 
26 
2 
16 
10 
27 
1 
17 
15 
27 
12 
15 
28 
i 
13 
15 
30 
5 
15 
25 
Julv 7 
9 
12 
26 
12 
11 
1 40 
212.82 
Total. 
2 Weighted average. 
ties there is also a great tendency 
for the larva to feed on leaf veins 
and in the flower cluster. 
Its manner of passing the 
pupal period and its relation to 
temperature are very similar to 
those of the larger species. 
LIFE mSTORY. 
EMERGENCE FROM HIBERNATION AND 
OVIPOSITION IN 1916. 
Adults were first noted in 1916 
on May 29 and appeared in abun- 
dance at that time. Beetles 
were copulating on the day when first observed and this was con- 
tinued intermittently as long as beetles of this generation were found 
on the vines. Oviposition was first noted on June 6 and continued 
until after the middle of July. 
INCUBATION. 
The incubation of eggs recorded in 1916 required from 11 to 17 
days with an average of 12.82 days, as shown in Table XII. 
TIME AND DURATION OF THE LARVAL FEEDING PERIOD OF ALTICA WOODSI, NORTH 
EAST, PA., 3916. 
Forty-one larvae were carried through the larval feeding period 
from the date of their hatching to the date of their entering the 
ground. The diu'ation of this period varied from 13 to 27 days, with 
an average of 18.71 days. The period covered by records on feeding 
larvse extended from June 18 to July 26. Complete data on the time 
and duration of this period are given in Table XIII. 
Table XIII. — Time and duration of larval feeding period of A. woodsi, North East, 
Pa., 1916. 
Date of 
Date of 
entering 
ground. 
Number of 
Duration 
Date of 
Date of 
entering 
ground. 
Number of 
Duration 
hatching. 
larvae. 
of period. 
hatching. 
larvae. 
of period. 
Days. 
Days. 
June 18 
July 7 
19 
June 26 
Julv 15 
1 
19 
18 
10 
22 
28 
21 
2 
23 
20 
10 
20 
29 
15 
4 
16 
21 
10 
19 
30 
18 
1 
18 
22 
19 
30 
24 
1 
24 
23 
10 
U 
! July 1 
24 
1 
23 
23 
12 
19 
4 
17 
1 
13 
24 
10 
16 
4 
21 
4 
17 
24 
12 
18 
8 
21 
2 
13 
25 
17 
22 
8 
26 
1 
18 
25 
18 
23 
26 
. 
14 
18 
1 41 
2 18. 71 
1 Total. 
2 Weighted average. 
