. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE BEAjST LADYBIRD. 9 period extended from July 25 until September 2, a total of 40 days. With other females this period covered from 35 to TO days. The life cycle from egg to adult and the periods of the stages by days are given in Tables III and IV respectively. Table III.—Life cycle of Epilachna corrupta. Event. Eggs deposited. Larvae hatched Larvae molted. Larvae molted. Bate. 1916. Aug. 10 Aug. 18 Aug. 21 Aug. 25 Event. Larvae molted Larvae reached maturity Larvae pupated Adults developed Hate. 1916. 30 Sep
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE BEAjST LADYBIRD. 9 period extended from July 25 until September 2, a total of 40 days. With other females this period covered from 35 to TO days. The life cycle from egg to adult and the periods of the stages by days are given in Tables III and IV respectively. Table III.—Life cycle of Epilachna corrupta. Event. Eggs deposited. Larvae hatched Larvae molted. Larvae molted. Bate. 1916. Aug. 10 Aug. 18 Aug. 21 Aug. 25 Event. Larvae molted Larvae reached maturity Larvae pupated Adults developed Hate. 1916. 30 Sept. 3 Sept. 5 Sept. 12 Table IV.—Periods of stages of Epilachna corrupta. Instar. Egg period First larval stage period. .• Second larval stage period Third larval stage period. Number of days. Instar. Fourth larval stage period Pupal period Total Number of days. The beetles which developed August 31 fed, without mating or depositing eggs, until October 5, when they began hibernation. No- vember 10. 1916, the cage was placed in the laboratory cellar and removed to the open April 17,1917. The beetles issued from hiberna- tion June 15, 1917, and were then killed, closing the record. Records of egg-laying were obtained by confining single pairs of beetles, immediately after mating and before the first eggs were deposited, in small rearing jars. The beetles fed on bean leaves and the eggs were removed as deposited and counted. The number of eggs deposited by eight females of the first and second generations were: 504, 552, 616, 636, 850, 942, 1,147, and 1,516, respectively, or an average of 845 eggs to a single beetle. A detailed record of the female of one of these pairs of beetles, which developed July 17, 1916. and mated July 22, is given in Table V. Table V.—Egg-laying record of a single female of Epilachna corrupta in 1916. 1916 July 25 July 28 July 29 Aug. 1 Aug. 3 Aug. 5 Aug. 6 Aug. 9 Aug. 11 1916 Aug. 15 Aug. 18 Aug. 21 Aug. Aug. 26 Aug. 28 Sept. 2 Total Nu
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