30 Journal New York Entomological Society. [Voi. vi. 
tened a few silky threads over itself, a labor which was completed the 
following day, and passed into the pupal stage, having passed a larval 
period of, approximately, sixty-one days, and seventy-four days from 
time of deposition of the egg. 
The remaining two of the three larger larvae crawled down to the 
bottom of the breeding cage and began constructing their cocoons, but 
died before pupating. The imago of larva No. i, issued January 13, 
1897, thus giving a pupal period of thirty-five days, and one hundred 
and nine days from date of oviposition. 
Of the series of three smaller larvae, after December 4, two of them 
increased in size very rapidly, and, in fact, seemed to be gaining upon 
those of the first series, while the third, which, so far as could be de¬ 
termined, had continued to be the smaller since the time of measure¬ 
ment on November 19, did not increase in size so rapidly. While the 
two just mentioned became slightly lighter in color, precisely as had the 
three larger ones, this one continued to be much smaller and darker in 
color, the blackish stripes being quite conspicuous. 
The first larva of the three smaller ones to pupate will be designated 
as No. 2, the moth and cocoon beeing so numbered in the accompany¬ 
ing illustration. This was one of the two light colored larvae of this 
series, and began fastening the blades of grass together on the night of 
December 8, the imago issuing January 19, 1897, after a pupal period 
of forty-one days, and one hundred and fifteen days from date of ovi¬ 
position of the egg. 
The third larva reared to the adult moth will be designated as No. 
3, including adult and cocoon. This was second of the lighter colored 
of the second and smaller series, and began pupating during the night 
of December 9, but did not finish doing so until the following day, leav¬ 
ing the blades of grass which it had begun fastening together, with the 
evident intention of constructing a cocoon therefrom, and appropriated 
a bit of cotton that happened to be within reach, and constructed its 
cocoon from that, thus forsaking a natural material for an artificial, and 
seemingly one of more practical utility. I he imago appeared January 
23, 1897, after a pupal period of forty-four days, and one hundred and 
seven days from the deposition of the egg. 
The third of this series and the smallest of the larvae studied, 
escaped from its breeding cage, December 15, evidently when searching 
about for a satisfactory place in which to spin its cocoon. It continued 
to be of a darker color throughout, but had attained to the same size as 
its fellows. Later, an adult of this species was found dead in the insec- 
