256 Annals Entomological Society of America [Vol. IX, 



evening, near 6 o'clock, but they do not fall into deep slumber 

 until 9 or 10 o'clock, but even then they retain enough self- 

 control and vigor to teasingly wriggle away from one when 

 caught. 



Pyrameis cordui Linn. [G. T. Hosenfelt]. 

 This butterfly was found asleep just above my head on a 

 cedar tree in Kansas, August 13. It was so languid that it 

 was easily taken with the fingers. 



Thecla melinus [G. T. Hosenfelt]. 



This red spotted butterfly was found asleep at 5:45 a. m., 

 August 18, on the under side of a leaf of horse-weed, three feet 

 from the ground. 



Anosia plexippus Linn. 



This milkweed butterfly is a rapid flyer during the day. 

 That it actually sleeps at night I have no doubt after having 

 observed a large number of them in eastern Kansas between 

 August 8 and 18. They usually select the apex of some tall 

 plant, like Erigeron, corn or horse-weed, or choose a twig of a 

 tree at the same height, always about six feet frorh the ground, 

 many are to be seen still on the wing at 6 o'clock in the evening, 

 but by 6 :30 they are settling down on their chosen roost for the 

 night, and an hour later they are sleeping so soundly that they 

 are powerless to escape when disturbed. They cling tenaceously 

 to the support in their sleep, and are not aroused by a 

 strong light falling full upon them. Even when handled they 

 show no response, and when dropped, only flutter aimlessly 

 and fall. They are commonly to be seen mating on the wing 

 during the day, but sometimes spend the night in copulo and 

 are very slow to separate when disturbed. They are early 

 risers, and are actively flitting about long before most other 

 insects. On three different mornings in August, many were to 

 be seen flying about at 5 :30 and 5 :45 o'clock. 



Argynnis cybele Fab. [G. T. Hosenfelt]. 

 Lake View, Kansas, August 19. At 6:10 p. m. this silver- 

 spotted butterfly was asleep on the under side of a red-haw leaf 

 twelve feet from the ground. After vigorous and prolonged 

 shaking of the bough it awoke and flew away ; the next morning 

 at 7 o'clock it or another of the same species was again fast 

 asleep on the identical spot. 



