21 
We shall therefore endeavor, by an examination and comparison 
of all the data accessible, to ascertain what the average length of 
these stages is in a state of nature. 
As bearing upon this question and as data we wish to use, we 
give here a list of the dates of captures of the moth, and also of 
the appearance of the larvae: 
DATES OF CAPTURES OF THE MOTH. 
Illinois —Carbondale, Jackson Co.: 
April 2, 6, 7, 8, 9, 10 (1879); 18 (1878); 2, 3, 4, 13, 15, 21, 25 
(1880). 
June 21, 22, 23 (1875, observed on these days emerging from 
the ground) 29. 
October 18, 24 (1879). 
November 10 (1879). 
Murphysboro, Jackson Co: 
June 20, (1861, day of exit from the pupa in confinement). 
Cook Co.: 
August 17, 18, 19, 20, 21, 24, 25, 26, 27, 28, 31. 
September 1, 2, 3, 4, 7, 8, 9, 10, 11.—(Westcott.) 
In October.—(Bartlett.) 
“April 3, 10, 11, 16, 19, 25, 26, '27, 28, 30 (1878). 
“May 2, 15, 16, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 (1878). 
“June, July, August, September to October 18 (1878). 
“November 7, 8, 11 (1878).”—(Worthington.) 
Normal, McLean Co.: 
May 24, “two specimens.” “June 28, several.” “From July 15, 
to August 18, very common each year.—(Forbes.) 
Woodstock: 
Larva entered the pupa state July 9. Moth issued July 20, 
(1876).—(Coquillet.) 
Galena in 1876-7.—(Bean): 
(1876) August 1. Abundant and has been so for a week. 
August 1, 2, 3, 4, 7, common. 
August 13, decreasing; 23, very few; 31, occasional. 
September 7, very few, fresh looking; 18, frequent. 
October 9, noted; 22, two; 23, one; 30, frequent. 
November 12, noted. 
(1877). April and May.—Not found, although frequent and 
careful observations were made. 
June 7, few; 24, 29, several. 
July 3, frequent; 6, noted; 15, noted; 23, 27, few. 
August 5, 12, occasional; 14, 15, 19, 20, 26, 27, frequent. 
September 14, several; 23, noted. 
October 13, several. 
Dimly remember captures, think (1878) indicating probable hiber¬ 
nation in pupa state for this locality, but can’t be sure. 
Missouri —St. Louis : 
“Early part of April;” “Middle of April;” “June to October;” 
“early in August;” October 9.”—(Riley.) 
