116 Psyche [August 
died. One other was injured by a fall after pupating, and died. 
Eight, all males, reached the imago stage successfully. The 
small size of the pupa which died warranted the surmise that it, 
also, was a male. 
The butterflies were all closely like the type specimen of arthe- 
chippus in the Museum of Comparative Zoélogy, described by 
Scudder (1889), and the two specimens captured on the wing in 
Alstead, N. H., and deposited in the same collection. The older 
specimens are likewise all males. 
Diligent efforts were made to mate these butterflies with females 
of allied species. Arthemis, archippus, astyanax and proserpina 
were all tried, in different breeding cages and in various numbers 
and groupings, but no mating occurred. Both sexes, however, 
in several instances showed marked sexual excitement, and their 
failure to copulate is probably to be ascribed to some unfavorable 
element in the illumination of the cages at critical moments. 
On August 30, 1910, at Alstead Center, a female Basilarchia 
astyanaz, reared in captivity from a larva obtained near Brooklyn, 
N. Y., mated with a male arthemis captured in Alstead. The 
duration of copulation was fifty-five minutes. The female was 
afterward imprisoned over carefully-inspected wild cherry shoots, 
on the leaves of which she deposited eighty-two eggs. Oviposi- 
tion was begun on September 5, and extended over nine days. ° 
The eggs were extremely slow in hatching, and no exact count 
of the young larvee was obtained. Forty-one survived the early 
frosts, and the construction of hibernacula began on October 21. 
The hibernating larvee were kept through the winter in an outdoor 
shelter in Milton, Mass., and bagged out on inspected shoots of 
wild cherry April 27, 1911. On May 7 they began to emerge from 
their nests, but their number had dwindled to ten when the count 
was made. All of the ten pupated successfully, but only eight 
reached the imago state: five males and three females, all rather 
dark examples of proserpina. 
Efforts to breed these butterflies with one another were unsuc- 
cessful. Attempts were then made to mate them with arthemis 
and astyanax, the two parent species; and the females were intro- 
duced into the boxes containing the males of arthechippus, already 
described; but no copulation occurred. 
