State A gricvltural Society. 
889 
TWELFTH REPORT 
ON THE 
NOXIOUS, BENEFICIAL AND OTHER INSECTS, 
Of the State of New York. 
BY ASA FITCH, M. D. 
Buffalo Tree-hopper, Ceresa bubalus, Fabricius. (Homoptera, 
Membracidte.) 
Wounding raspberry stalks, grape vines, and apple twigs, in autumn, by pierc¬ 
ing them with numerous holes placed regularly in a straight row some two inches 
in length or more; a beech-nut shaped tree-hopper of a grass-green color, and having 
anteriorly on each side a short sharp point projecting horizontally outwards and 
resembling the horns of a bull or buffalo. 
A figure of this insect and a brief general notice of it was given 
in my Third Report (Transactions 1856, page 335). Important 
additional facts in relation to it have since been obtained, whereby 
I mn now able to present a full account of its habits and trans¬ 
formations. Some of these facts have already been communicated 
to the public in an article in the American Agriculturist, June, 1862 
(vol. xxi, p. 172). 
In the winter and spring a peculiar kind of crack or scar is 
sometimes observed on the twigs of the apple, cherry, willow and 
other trees, extending lengthwise of the twig, from half an inch to 
three inches in length. It occurs on twigs which are nearly or 
quite a quarter of an inch in thickness, and two or more of these 
scars are sometimes seen at different points along the same twig. 
Their surface is raised slightly above the level of the bark and has 
a rough, cankered appearance, with a deep crack along the middle, 
in which crack a row of small holes is more or less distinctly to 
he seen, extending the whole length of the scar. Upon splitting 
the twig it is discovered that these holes are borod.downward into 
or quite through its pith, in an oblique or slanting direction, each 
hole being somewhat bent or curved, and occupied by the egg of 
an insect. 
