March, 1898.] WEBSTER: DEVELOPMENT OF DRASTERIA ERECHTEA. 31 
tary, during the latter part of January, and as this was the only example 
found and the date of finding corresponds so nearly with that of the 
•appearance of the remainder of the whole series, together with the fact 
that there was hardly a possibility of a larva having been unintentionally 
introduced from without, there is little doubt but that this was the imago 
from the larva which had escaped from its breeding cage. It was very 
■ similar to No. i, being about the same size, but somewhat darker in 
color. The mother of the whole three being lighter and of the type of 
No. 2. 
About October xo, 1896, Mr. Mally brought in from the fields three 
larvae, seemingly nearly full grown, and these were placed on clover and 
blue grass in a breeding cage in the insectary. About October 22, all 
three of these formed cocoons similar to the one shown in No. 4, which 
is composed of three clover leaflets fastened together, while still attached 
to the petiole, thus making a neat and deceptive case, having three quite 
conspicuous angles. 1 he weight of the pupa of course caused them to 
turn downward, but even then they appeared like a drooping, withered 
leaf, and for this reason very apt to be overlooked. One of these three 
pupae was preserved for a cabinet specimen, the second died, while the 
third transformed December 6, and is shown with cocoon in No. 4. 
Of two larvae brought in from the fields and placed in jelly cups 
about October 21, one formed a very slight cocoon of silk as shown in 
No. 5, and the other fastened blades of grass together, as shown in No. 
6, notwithstanding both were supplied with grass for food, and hence 
both had the same material from which to construct their cocoons. The 
imagos both appeared December 18, 1896. 
The latitude of Wooster, Ohio, where these experiments were carried 
on, is 40 0 48', while that of Carbondale, Illinois, where Professor 
French studied the species, is about 37 0 45'. It will be observed that 
with him the egg period was less than half as long as with me, while 
with him the species developed in from 41 to 66 days from the egg, 
the majority going from 48 to 53 days, with me this period varied from 
107 to 115 days. The eggs which furnished the basis for his breedings 
were deposited August 13, and those which I followed were deposited 
on September 24 or 25. 
I am quite certain that, here in northern Ohio, the insect goes into 
the winter in the larval stage, as I have observed nearly full grown larvae 
crawling about after the middle of November, though hibernation may 
also occur with pupae or even adults. In southern Ohio, I have ob¬ 
served seemingly freshly emerged adults early in April. All of my 
