“ Undoubtedly this species hybernates. Early in November the butterflies 
that I had bred from larvae were still active but had gone into winter quarters 
among the dried leaves and stems of the food plant in the breeding cage, selecting 
the closest, narrowest corners and squeezing themselves in. After the weather had 
become quite cold I put the cage into a dark cellar and left it there about a week 
when I brought it back to the warm room. The butterflies were dormant but soon 
revived and flew about as briskly as ever. I then returned them to the cellar 
where they remained till the Spring when I brought them out and placed them in 
the sun. After a few hours two revived and flew about the room. The other 
was dead. 
“ During last winter, (1870) in February, a tree was felled on the line of the 
railroad on which I was at -work. As it fell it split open and was found to be 
hollow. The cavity was partly filled with dirt and hickory-nut shells, but among 
the stuff that fell out were some twenty butterflies, mostly Vanessas — Antiopa and 
Atalanta. But among these were seven specimens of Glycerium. 
“ This species has but one brood. I have noticed that the food plant does not 
sprout up and leaf sufficiently to support the larvae before 1st of July. 
“ I have found the butterfly very common wherever the food plant occurs 
throughout South Western Missouri, Southern Kansas, the Indian Nations and in 
Texas, particularly on the dry hills bordering on the Brazos River.’’ 
I have also received notes respecting this species from Mr. J. H. Muhleman, 
ofWoodburn, Ills., who seems to have first observed its transformations. Mr. 
Muhleman says, “I am satisfied that there is but one brood. Last year I examined 
the food plant during several months, but found no larvae till September. The but- 
terfly is shy and difficult to capture. I have observed it in orchards resting on the 
sunny side of the trees, at other times on the road or upon the fences, and it has much 
the appearance of a Vanessa, only while this last rests with wings half spread, 
the other rests with wings closed. I have found the larvae from 3rd September 
to 30th The chrysalis state lasts from 10 to 14 days. My last butterfly ap- 
peared 10th of October. At this date, 25th of Jan., I have two living specimens, 
proving the fact of the hybernation of the species.” 
