ZOOLOGY. 57 
Passing over the statements in De Candolle’s ‘‘ Introduction à 
étude de la Botanique” (Tome 1, p. 415) 1835; in Treviranus’ 
Physiologie der Gewachse (1838, vol. ii, s. 759), in Meyen’s 
Neues System der Planzen Physiol. vol. iii, s. 550, we find in 
Botanische Zeitung, June 29, 1860, an article by Nitschke, de- 
tailing an extensive series of experiments upon Drosera. These 
results, together with the very curious observations published in 
Comptes Rendus last year, we will present at an early day, feel- 
ing quite confident that many of our readers will carefully repeat _ 
some of these experiments during the coming season.—G. L. G. 
ZOOLOGY. 
A New Acertan Marre Borer. — Last June my attention 
was drawn to numerous castings, similar to those of the peach 
tree borer ( Trochilium exitiosum Say) projecting from the trunk of 
the soft maple trees surrounding our university yard. Having 
approached one of these trees I found several moths already 
hatched out, the most of the maple trees having been destroyed 
by this pernicious insect, which, boring in the bark and sap-wood, 
not only hinders the sap from circulating, but also enfeebles the 
trunk so that it is no es ad able to support the weight of its 
foliage. 
During this summer a dozen of these trees were broken down, 
and the few still standing are in such a condition that I believe 
they will not resist the winds of a second season. This condition 
of things induced me to pay close attention to this insect — study- 
ing its habits and collecting specimens. I failed to find it de- 
scribed in any of the entomological works of the university 
library and I have been informed that Dr. Le Baron, State Ento- 
mologist, was not aware of any Ægerians feeding on the maple 
tree. 
My confidence in this second statement having been reénforced 
by a similar answer of several men of experience that I consulted 
on the matter, I came to the conclusion that this insect is a new 
destroyer and enemy of our best shade tree. I therefore give you 
a description* of this insect, adding what I could observe on its 
*TROCHILIUM ACERICOLUM, n. sp. The female, he perfect insect of this Ægeria, 
measures across saa wings from "13-16 om 15-16 of an spe its wings are transparent. 
Fore wines; the tips yellowish, opaque, with black veins; front margin and fringe 
black; a steel-blue transverse band Br their middle. HIND WINGS with a 
