June, '06] ENTOMOLOGICAL NEWS. 215 



The first appearance of C. pipiens in the season of 1905 was 

 noticed in the evening of April i4th. In 1906 it appeared 

 April 1 7th ; the first deposit of eggs was made April 2ist 2 

 masses hatched April 28th. Three masses of April 28th 

 hatched April 3oth ; on the latter date 4 masses were deposi- 

 ted ; May 2nd, 10 masses ; May 3rd, ijth and May i4th, 33 

 masses in one rain barrel. Let us note the egg deposits in one 

 barrel throughout the season of 1905 : On May gth (the first 

 deposit), 2 masses; May loth, 10 masses, then more or less 

 every day, and a few cool days no deposits. In June the high- 

 est number deposited was 16 masses. In July the number 

 reached from 18 to 30, and in some prolific depositing periods 

 through the month of August, 34 were found. A count of 34 

 masses, September roth, showed 6962 eggs as the deposit of a 

 single night ; October ist, 26 masses, 6554 eggs ; October 2nd, 

 38 masses, 6525 eggs. Egg laying now decreased to 6 or more 

 masses, some days none, and on a warm day, as October loth, 

 21 masses 4429 eggs ; no more deposits from that on to Octo- 

 ber 1 5th, ?3 masses; then October iyth, 12 masses; October 

 2oth, 4 masses ; October 25th, 6 masses. No eggs were de- 

 posited from the last date until November ist, 7 a.m., 1905, 

 which was the last deposition of the season, and was made in 

 a bucket containing manure water. The last deposition which 

 took place in 1904 was 2 masses on October 3 ist. 



The time of egg laying changes with the stage of the season. 

 Most of it is expected in the early morning hour. In spring 

 it does not occur as early as in mid summer, in the latter 

 part of August it is already at about 6 a.m. that the last de- 

 positions are noted, and by the closing of the season 7 a.m., 

 and a deposition has been found as late as 10 a.m. in the latter 

 part of October, but at no time have I observed any deposits 

 in day time during the summer. 



The minimum duration of the entire life round for C. pi pic us 

 as observed during the month of July was eight days and nine 

 hours. This is possibly the shortest period on record for this 

 species. The mass was composed of 392 eggs and was remark- 

 able for its percentage of production, which was 365 adults 

 159 males and 206 females, and still more remarkable- is the 



