THE CANADIAN ENTOMOLOGIST. 123 



CASES OF LONG PUPAL PERIODS AMONG LEPIDOPTERA. 



BY R. R. ROWLEY, CURRYVILLE, MO, 



In May, 1888, I received from Mr. W, H. Edwards, of Coalburgh, 

 two larvae of Anthocharis ge?iutia which were feeding on pepper grass. 

 On the 22nd (May), both larvae pupated, having suspended two days 

 before. 



As the imagoes did not appear in a reasonable length of time, 

 I communicated the fact to Mr. Edwards, and he informed me they 

 would remain chrysalids till the next May. The summer of 18S9 came 

 and went and still my little Genutia pupae slept on and entered upon the 

 second year of their fast. I then learned of the tendency in the genus 

 Anthocharis to remain two years in the chrysalis state. 



The pupae were kept through the past two winters in a closet adjoin- 

 ing a warm room, and the first imago, a beautiful male, appeared March 

 7th, 1890, the other, a female, five days later (12th), after a pupal period 

 of nearly twenty-two months. 



In a recent letter from Mr. Edwards, I was informed that the Cali- 

 fornian species of Anthocharis often remain two years as chrysalids, but he 

 does not state that he has ever known a Genutia pupa to go so long. 



Another case. — On the 13th of February, 1888, 1 received four cocoons 

 of Callosamia angulifera from Miss E. L. Morton, of Newburgh, N. Y. 

 These cocoons were spun in the mid-summer of 1887. Three of them 

 produced imagoes the following May, but the fourth remained over till 

 the 19th of the next April (1889), having passed twenty-one or twenty- 

 two months in the pupal state. I have had pupae of Triptogon modesta, 

 Philampeliis pandorus, Citheronia regalis and Eacles imperialis to fail 

 to give imagoes in the spring, living through the summer, and lingering 

 even till early autumn before death overtook them, but never knew one to 

 survive till the second summer. 



NOTES, 



A Rare Butterfly, — We learn from the Ottawa Naturalist that five 

 specimens of Erebia discoidalis Kirby, one of the rarest in the Canadian 

 fauna, were taken by Mr. John D. Evans, at Sudbury, Ontario, on the 

 1 2th May last. The perfect insect is figured and described in Edwards 

 "Butterflies of North America," 3rd Series, Part VII. 



