840 
ANNUAL REPORT OP NEW YORK 
JOINT-WORM FLY. ITS NEAREST KINDRED. 
ing in such a number of these barley flics and a still larger num¬ 
ber of the flies from the joint-worm, how perfectly constant and 
uniform the insects from these two sources were in the colors of 
their bodies and limbs, the fact became patent that the fly 
obtained from the A r irginia joint-worm was a distinct species 
from the Massachusetts barley-fly, and not a mere variety of it 
as I had all along supposed it to be. An article upon this sub¬ 
ject was thereupon inserted in the Journal of the Society, for 
April 1859, (vol. ix, p. 115,) in which I named and gave the dis¬ 
tinctive marks of these three species, about as follows: 
1 he Black-legged or Massachusetts harley-fly, Eurytoma 
Hordei, Harris, is black, its feet and knees pale dull yellow, its 
anterior shanks of the same dusky or blackish color with the 
middle and hind ones, its neck with a dull whitish transverse 
spot on each side. 
The Joint-worm fly, which I name Eurytoma Tritici, is black, 
its feet and knees and its anterior shanks dull pule yellow , its neck 
with a dull white spot on each side. 
The Yellow-legged or New York barley-fly, Eurytoma ful- 
vipes, is black, its legs bright tawny yellow , its feet whitish, its 
neck with a small dull white dot on each side. 
In this connection it should be added that a fourth fly of this 
kind has recently commenced infesting the rye in the eastern 
part of Pennsylvania. I described this species in the American 
Agriculturist, August 1861, (vol. xx, p. 236) giving it the name 
of the Rye-fly, Eurytoma Secalis. It is intermediate between 
the Joint-worm fly and the New York barley fly, its anterior and 
posterior shanks being du'l pale yelloio, the middle ones only 
being black. 
These four insects are closely alike in their size, form and 
• sculpture, the differences in the color of their legs being the 
most conspicuous and almost the only character whereby they 
are distinguished from each other. The males are much less 
numerous than the females and are usually smaller in size, with 
the abdomen of a different form. It is oval and somewhat 
depressed or flattened in the females, and when I had before me 
specimens of this sex only, 1 much doubted whether they right¬ 
fully pertained to the genus Eurytoma. It is the males only 
which present the characters assigned to this genus by authors. 
In these the abdomen is compressed, more strongly so in some 
