INSECTS INJURING THE BLACK ALDER AND COFFEE TREE. 673 
(Psylla buxi Linn.)) a species hitherto not known to occur in America. 
It is of a pale-green color with hyaline wings, the anterior and middle 
portions of the thorax (pronotum and dorsulum) having brownish, 
longitudinal markings, the larva and pupa being of still paler, uniform, 
greenish color, and not deviating in form from the larva? of other species 
of the same genus. The winged insect bears a deceptive resemblance 
to our native Hornbeam Psylla (Psylla carpini Fitch), and can only be 
distinguished from this upon close examination, the most obvious dif- 
ference being the absence of a distinct pterostigma in the Box Psylla. 
Mr. Angus attempted to brush the Psylla off with a stiff broom, but 
this is a remedy of very questionable value, and a much simpler and 
doubtless more effective way of getting rid of this pest would be the 
application of diluted kerosene emulsion in a very fine spray. 
There is no danger that this newly imported Psylla will infest any 
other plant, besides the box, but, if not kept in check, it is liable to 
spread and to do serious damage to the plant in all those sections of 
the country where it is grown and esteemed as an evergreen ornament. 
(Report of Professor Riley for 1881, p. 410.) 
INSECTS INJURIOUS TO THE BLACK ALDER. 
Prinos verticillata. 
1. Hyperchiria io Fabr. (L. W. Goodell, Can. Ent., 1879, xi, p. 79.) 
KENTUCKY COFFEE TREE. 
Gymnocladus canadensis. 
This tree is perhaps as abundant in this part of Kentucky as any- 
where else, but the only Lepidopteron that I have ever found feeding 
on it is an undescribed Psylla, of which I have sent all my specimens 
to Mr. C. V. Riley. (Chambers, in letter.) 
5 ent 43 
