STATE AGRICULTURAL SOCIETY. 
840 
RYE-FLY. IN PENNSYLVANIA. 
width of its base equalling its length. The hind feet instead of this too and nail have at 
their ends a pair of hooks. 
The WINGS are transparent, glassy and colorless, except on the disk of the forward pair 
adjacent to the inner side of the rib-vein, where a large smoky yellowish cloud is faintly per¬ 
ceptible. The rib-vein is fringed with long hairs, liko oyo-lnshes, along its outer side; it 
unites with the outer margin in its middle, and continues thus united for a short distance 
only, before it gives off tho stigmal branch, which branch is short, thickened at its ond, and 
notched, tho outer tooth being small and slender. 
Tho mai.es are smaller than the females, measuring 0.10 to the end of their wings, which 
reach a little beyond the end of tho body. Their antennae are also longer, reaching half tho 
length of the body, and arc thread-liko or of equal thickness through their whole length, 
and thinly boarded with short robust bristles. They are oomposed apparently of nine joints, 
which aro of a'cylindrical form, three times as long as thick, the second joint being shortest, 
but little longer than thick, and the third joint longer than those which follow it. The 
joints aro separated by a wido notch on their upper side at each articulation. The last 
joint is rather longor than those which procode it and tapers to an acute point at its tip. 
The abdomen is shorter than the thorax and of a flattened oval form. Tho thighs arc black 
at their bases and the hind pair is wholly black, except at their tips. The hind shanks also 
are dusky at their tips. 
The joints of the antennas in the males of this species are not 
surrounded with whorls of hairs as they are in Eurytoma Hordei. 
It perhaps does not rightfully pertain to this genus, therefore, 
though I see no other one in which it can be included. 
11. Rye-fly, Eurytoma Sccalis, Fitch. (Ilymenoptora. Chalcidida).) 
In rye, particular stalks stunted and bent at one of their lower joints, whore is a hard 
woody swelling, the surface of which show's little smooth blister-like elevations within which 
is a cavity in which lies a soft white or straw-colored maggot, which remains in the ripened 
straw till tho latter part of tho following May, wheu it guaws a hole in the straw and comos 
out, a shining black fly resembling a small ant 0.10 long, its knees and feet and its fore and 
hind shanks pale dull yellow, the middle shanks black. 
In August, 1S60, Daniel Steck, Esq., of Lycoming county, 
Pennsylvania, transmitted to the office of the American Agricul¬ 
turist, several pieces of rye straw, containing the larva) of an 
insect which had made its appearance in his vicinity and was 
attracting notice by the injury it was threatening to do to this 
grain crop. In May 18G1, additional slips of this diseased straw 
were sent by him, two of which were forwarded to me for infor¬ 
mation as to what insect this was, Mr. Stock himself supposing 
it to bo a Ceoidomyia analogous to the Hessian fly. The straws 
received were of the previous year’s growth, which had been 
kept in a cool place, whereby the insect had probably been some¬ 
what retarded in completing its transformations. They reached 
me on the first of June, and the flies were then coming out from 
the straw. In a few days fifteen specimens were obtained, all 
save one being females. 
Tho disease in the straw was plainly the same as that in bar- 
[Ag. Trans.] 54 
