CLOVER-LEAF WEEVIL. 
9 
and observations made by different, members of the Bureau of Ento- 
mology would indicate that ovipositing beetles in the latitude south 
of southern Indiana are capable of laying fertile eggs in the spring 
and that two broods sometimes, if nor ordinarily, occur annually. 
The larvae have often been observed feeding during the mild days 
of winter on the small leaves at the crown of the clover plant. In 
the early spring the larvae commence to feed as soon as the clover 
starts its growth, but feeding and growth are intermittent, due to 
climatic changes, so that larvae of all stages may be found during 
April and May. Larvae in the first three instars are most numerous 
in April, but beginning with May there is a gradual falling off in 
numbers of larvae in the first two instars, those in the third and 
fourth predominating. By the end of May few active larvae remain 
and by June 20 practically all have completed their growth and spun 
their pupal cocoon. Tables II and III give the number of days 
passed in different stages and the dates of their occurrence in the 
field. 
Table II. — Hypera punctata: Length of larval and pupal periods. 
Aver- 
Larva. 
First instar 
Second instar 
Third instar 
Fourth instar . . . 
Spinning cocoon . 
Prepupa , 
Pupa 
Length of time remaining in cocoon after adult. 
Number 
of exam- 
Mini- 
Maxi- 
ples. 
mum. 
mum. 
Days. 
Days. 
6 
17 
20 
19 
4 
15 
23 
4 
13 
32 
8 
21 
57 
1 
2 
44 
1 
10 
53 
5 
16 
56 
1 
5 
Days. 
m 
10 
8* 
14| 
1 + 
4 
HA 
21 
Table 
III. — Hypera punctata: Stages 
occurring in field at 
different date. 
Date collected. 
First 
stage. 
Second 
stage. 
Third 
stage. 
Fourth 
stage. 
Pre- 
pupa. 
Pupa. 
Oct. 14.. 
1915. 
2 
2 
1 
1 
1 
18 
19 
18 
32 
6 
33 
Oct. 19 
3 
Oct. 20 
Oct. 21 
3 
1 
2 
19 
45 
34 
7 
28 
Oct. 22 
Oct. 27 
Nov. 4 
2 
14 
13 
1 
5 
4 
4 
4 
2 
2 
12 
1 
1 
9 
14 
9 
10 
l 
1 
No v. 23 
Dec. 13 
Jan. 3 i. . 
1916. 
Jan. 28 
Mar. 25 
3 
6 
6 
4 
3 
15 
4 
2 
l 
Mar. 31 
1 
Apr. 3 
l 
2 
2 
Apr. 10 
Apr. 15 
10 
4 
Apr. 18 
Apr. 20 
3 
Apr. 27 
2 5 
2 1 11 
6 
14 
9 
10 
2 
4 
May 5 
May 8 
3 
1 
1 
May 18 
May 25 
1 
May 26 
15131°— 20— Bull. 922- 
