June, '21] WADLEY: variegated cutworm 275 



Summary of Life Cycle 



Observations on the time of maximimi emergence and the time of 

 maximimi oviposition of two consecutive generations in 1915 confinn 

 the conclusion that the average time required for a generation in sum- 

 mer is not far from 50 days in Southern Kansas. 



Doctor Chittenden gives the larval stage for this species as 3 to 4 

 weeks at Washington, D. C, while Lintner states that it is 23 to 28 

 days in New York; both state that the pupal stage is from 11 to 20 

 days. Slingerland states that various workers have estimated the life 

 cycle at 35 to 62 days ; Doane and Brodie believed that in Washington 

 State it was about 75 days. 



Seasonal History 



At Wichita in 1915, 3 consecutive generations were reared. Lar- 

 vae of these species, presumably of the first generation, were active 

 late in May and in June, and pupated late in June; adults emerged 

 early in July and deposited eggs soon after emergence. Second -gen- 

 eration larvae hatching from these eggs pupated early in August, and 

 became adults late that month. Eggs were deposited by these adults, 

 and the larvae hatching from them developed more slowly during Sep- 

 tember. Many of them died, but some pupated in October and be- 

 came adult in November, although subjected at times to freezing tem- 

 peratures. In May, 1914, eggs of this species, evidently deposited 

 by an overwintered individual, were found on a towel. They hatched 

 May 14; the larvae pupated about Jime 10 to 15, and became adult 

 late in June. From eggs deposited by them a few adults were reared 

 in August. At Garden City in 1913 moth traps were ran from early 

 summer until late in November. A scattering occurrence of Lyco- 

 photia adults is noted all season, but they occurred in exceptional 

 abundance at 3 periods; about July 10, August 15, and November 1. 

 These periods of abtmdance must correspond to the first, second and 

 third generations reared at Wichita in 1915. A few first generation 

 larvae were reared at Wichita in 1916, and at Muscatine, Iowa, in 1919; 

 in both cases the adults emerged late in June. Adults were seen fly- 

 ing in July at Wichita in 1917; In Iowa in 1919; and in Northern Illi- 

 nois in 1920. In the latter locality a small larva, evidently of the 

 second generation, was taken July 26, 1920. 



From this it would seem that the species has three generations in 



