CLOVER-LEAF WEEVIL. 
The eggs are laid in or on different parts of the clover or alfalfa 
plant, more often in a puncture on the stem or leaf sheath or on the 
outside of these parts in the fall of the year between September 8 
and November 29. The eggs laid previous to October 25 hatch the 
same fall, and hibernate as first, second, and third instar larvae while 
those laid after October 25 usually remain over winter as eggs, and, 
except in the case of eggs laid quite late, hatch the following March. 
The larvse feed on the foliage of their hosts and become full grown 
by the last of May, when they spin cocoons at or just below the 
surface of the soil, pupating therein and issuing as adult beetles in 
June or July. The beetles feed on foliage of clover intermittently 
until September when they mate, and soon thereafter egg laying 
begins. 
Since the period of oviposition extends over a number of weeks and, 
furthermore, eggs laid late in the season do not hatch until spring, 
STAGE 
JAN. 
FEB. 
MAR 
APR. 
MAY 
JUNE 
JULY 
AUG 
SEPT 
OCT 
NOV 
DEC. 
E 99 
first tnst&r 
Larva 
- 
Second instar 
Larva 
Third insf&r 
L&rVA 
Fourth ins far 
Larva 
■ 11 
Cocoon and 
Pupa 
Adu/t 
*""" 
Fig. 7. 
■Diagram illustrating life history of the clover-leaf weevil and indicating the abundance of the 
different stages during the season in the latitude of La Fayette, Ind. 
the various stages greatly overlap. The accompanying diagram (fig. 
7) illustrates graphically the life cycle of Hypera punctata. 
The experiments made by the authors were net started until Sep- 
tember 8, 1915, but some of the beetles collected September 1 had 
oviposited previous to September 8. 
The eggs are laid in the fall during September, October, and the 
first two weeks in November, although oviposition was observed as 
late as November 29 in 1915. Females laid during periods of 64 to 68 
days and individuals laid the following numbers of eggs: 74, 83, 108, 
162, 166, 176, 181, 196, 287. Following the last oviposition the 
females lived from 1 to 16 days, and all the males and females used 
in the experiments in the fall of 1915 and kept out of doors under 
normal conditions were dead by February 18, 1916. 
The beetles laid consistently between September 8 and November 
15, there being a marked increase in the numbers laid between 
October 15 and November 15. After November 15 the laying 
records were scattered. It was noticeable that none of the eggs 
laid after October 21 hatched previous to March 1, 1916, except 
in one case when eggs laid October 25 hatched during a period of 
