748 General Notes, [September, 
sprinkled with water in which London Purple has been mixed in 
proportion of about 1 pound of the purple to about 100 gallons 
of water, the young worms will all be destroyed thereby and no 
further disfigurement of the tree ensue from them. A second 
application about the middle of June to the more limited number 
of worms that hatch from eggs laid after the first application, may 
also be desirable. The purple can be got at wholesale from 
Hemingway & Co., New York, at from 6 to 10 cents a pound, 
and a few dollars’ worth would answer for the trees of the whole 
city. It would pay the Park Commission to have a_ special 
tank built and mounted on wheels for this purpose, with a force 
pump that might be worked with two men, while a third handles 
the atomizing nozzle through which the poisoned spray should 
be applied. One of the simplest and most satisfactory nozzles of 
this kind is made by two converging holes so that the two jets 
of water break each other as they issue. Important improvements 
in the mode of atomizing will be published in the next report of 
the Entomological Commission; but it is not necessary to illustrate 
them in this connection. A tank for poisoned water, such as I 
have indicated, would not only prove valuable in protecting the 
trees from this particular caterpillar, but from most injurious 
insects that ‘attack them, as, ¢. g., the imported Elm-leaf beetle, 
which is so bad on the elms in the grounds of the Department of 
Agriculture and elsewhere. No better investment can be made 
_ by the authorities. . 
For private gardens and parkings [ would recommend one of 
the ordinary force-pumps, and the Nelson aquepult will be found 
8 igs satisfactory —C. V. Riley, in Washington Evening 
lar. 
BLEPHAROCERIDa.—Mr. J. Q. Adams, of Watertown, N. Y., 
writes under date of June 28th, that he recently found what, from 
our description in a late number of the NaruraListT, he recog- 
nized as Belpharocerid pupa. They were in a very cold stream 
over smooth slate rock with numerous falls. They soon died and 
became foul, however, when transferred to still water. We sub- 
sequently succeeded in obtaining specimens in the pupa and 
imago state and they proved to be genuine Blepharocerids, the 
Species not yet determined. ; | 
REMARKABLE Case or RETARDED DEVELOPMENT.—Mr. J. D. 
Graham, of the Kansas State Agricultural College at Manhattan, 
