355 
In August, 1886, one injured larva was received from the well-known 
horticulturist, Mr. J. T. Lovett, of Little Silver, X. J., which he had 
found feeding upon Luna beans. Mr. Lovett wrote that the larva eats 
a small hole through the pod in such a way as to reach the bean, which 
is entirely excavated. July 6, 1892, Mr. Pergande, of this office, found 
one of these larva- eating into the pod of a garden bean near Ivy City, 
in the District of Columbia. July 14 this larva changed to a chrysalis, 
and the butterfly issued July 25. October 18 of the same year one of 
these larva- was found in the same locality eating into the pod of a 
Lima bean. 
Mr. Coquillett informs us that he found a larva of this species feeding 
on beans at Los Angeles,- Oal., September 5, 1889. It pupated Sep- 
tember 9, and the butterfly issued September 20. 
This insect is not likely to become a serious enemy to the bean crop, 
although in Harris's time some farmers are said to have been obliged 
to abandon hop cultivation on account of the work of these larva-. The 
larva is parasitised by an Ichneumon fly known as Anomalon i)seu<l<tr- 
giole How., the adult of which issues from the chrysalis, and this insect 
may be an important factor in regulating the increase of the butterHy. 
The very sensible measure whicli Mr. Scudder adopted in his great 
work on the butterflies of New England, of giving a final paragraph 
under the consideration of each species to the subject of desiderata, 
enables us to say at once that even from these fragmentary observa 
tions we have added something to the general knowledge of the life- 
history of this insect. Mr. Scudder says : " We have then scarcely a 
single satisfactory datum whereon to build the history of this insect." 
The facts recorded above show that in the District of Columbia there 
are at least two generations annually, and that the duration of the 
chrysalis state in midsummer is about eleven days; while in Southern 
California, more than two broods apparently occur, the duration of the 
chrysalis stage in September being the same as that with the mid- 
summer brood in the District of Columbia. 
GENERAL NOTES. 
A HOMEMADE COVER Foil FUMIGATION WITH BISULPHIDE OF 
CARBON. 
Mr. Edward B. Taylor, of Cleveland, Ohio, in a recent letter sug- 
gests the following method of making a. cheap cover for use in fumigat- 
ing low-growing plants with bisulphide of carbon : 
Take a barrel hoop, cut it in two, and fasten the pieces at right angles 
to each other, by making a hole with a brad awl through both and 
inserting a screw eye with the eye on the convex side, to be used as a 
handle for lifting. Spring the hoops to make a cover oi the size 
