STATE AGRICULTURAL SOCIETY. 
847 
yellow-legged barley-fly. the diseased straw, the larva. 
ing that this insect has extended itself over all that portion of 
the State where barley is most extensively cultivated. . 
On particularly inspecting the diseased barley straw it will be 
observed that when there are only two or three worms in it, 
lying slightly distant from each other, the stalk does not become 
bent or swollen into a knotty enlargement. On stripping off the 
outer sheath the point where each worm is lodged in the central 
or main stalk is indicated by a slightly elevated, smooth, glossy, 
oval spot, resembling a blister, placed lengthwise ol the stalk. 
On the surface of this spot the fine elevated lines which form the 
longitudinal fibres or veins of the straw are almost wholly oblit¬ 
erated, whilst around the margin of the spot these lines are 
crowded together and more or less wavy and distorted from their 
natural straight and parallel position. But where a number of 
the worms are nestled in the same part of the stalk, as they usu¬ 
ally are, just above one of the lower joints, the whole stalk 
becomes thickened and swollen, hard, knotty and of a wood-like 
texture, and so bent, so distorted and grown out of shape, that 
its natural structure is almost wholly obliterated. Upon the 
outer surface of this swelling several of the same elevated, glossy, 
blister-like spots occur which are noticed above. In cutting into 
one of these spots an oval cavity or cell is there found, about 
0.18 long and 0.05 wide, in which a worm resides. These cells 
are usually situated in the walls of the central stalk, though they 
sometimes occur also in the sheath which surrounds the stalk. 
but the straw is so much distorted and its structure is so changed 
and confused that it is frequently impossible to determine whe¬ 
ther it is in the outer sheath or the central stalk that these cells 
are formed ; the hollow in the centre of the straw being nearly or 
quite obliterated, in consequence of being encroached upon by 
these cells. The walls of the cells are quite thin, both above or 
over the worm, and beneath or between it and the central cavity 
so thin that they are slightly translucent. The surface on the 
inner side of the cells is smooth, and shows near its lower end a 
few small, black, shining grains, like scales, adhering to it; 
which are probably the feces of the worm. 
The worm or larva which lies in this cavity is about 0.14 long 
and 0.04 or slightly less in thickness. It is shining and of a 
very pale yellow color, almost white. It is straight, motionless, 
destitute of feet and of a distinct head, of an oval form, slightly 
