212 THE CANADIAN ENTOMOLOGIST. 



The second brood came from eggs laid ist June. I saw the female 

 ovipositing, caught her and confined in bag over a plant, and got many 

 eggs. This female was nearly perfect, and not long from chrysalis. (It 

 was on the next day, 2nd June, that I caught the hibernating female 

 before spoken of) The butterflies from this brood began to emerge 25th 

 June. 



The third brood raised by me came from eggs laid 29th-3oth July, by 

 a fresh female, confined as before. (During the interval between 25th 

 June, when the previous brood began to emerge from chrysalis, and the 

 29th July, when these eggs were laid, there was plenty of time for an 

 additional brood.) The butterflies began to emerge 20th August. 



The fourth brood raised by me came from eggs laid 30th August, and 

 the butterflies from these began to emerge 29th September. 



Now plainly the history of Archippus does not differ from that of any 

 other many-brooded species, except that in some the chrysalis hibernates, 

 while in others it is the imago.* 



I could adduce other instances, as Argynnis Cybele, Satyrus Alope, 

 Apatura Celtis, Limenitis Disippus, etc., but I have given enough to show 

 that butterfly life is of short duration ; that in the summer generations it 

 cannot exceed a few weeks, and that in all cases it probably terminates 

 shortly after copulation in one sex, and oviposition in the other • and that 

 the current opinion on the subject among lepidopterists is correct. 



Note. — I learn from Prof Lintner that Archippus is three-brooded in 

 New York. It may be so in the lowlands, and in the mountains be but 

 double-brooded. But whatever the number of broods, the behavior of 

 the species will be the same in one j^lace as in another. This butterfly 

 being cosmopolitan, adapted to all climates except the arctic, with a wide 

 range of flight in the individual, often migrating indeed from one region 

 to another, we may be sJre that the length or the shortness of the season 

 in special or in any localities cannot possibly eftect a radical change in its 

 habits. Therefore it was with much surprise that I read the following 

 statement gravely propounded by Mr. Scudder, in Psyche for July, 1875, 

 respecting this species, under the name of Danais Plexippiis : " In North 



* To show how readily Archippus lays its eggs in confinement, on 19th August, 

 1879, I tied a female over Asclepias, and within 24 hours had gotten 82 eggs. This 

 also shows that the eggs mature for deposition, not singly, but en masse. Fourteen days 

 later the larvae from these eggs were pupating. 



