806 General Notes. | August, 
ginal veins, The general surface of the wings show numerous short hairs, The 
males are nearly as numerous as the females, and all have perfect wings. ; 
Larva: The larva (Fig. 4) is yellowish-white; length 4™™: jaws dark, without 
teeth. The antennz are short, one-jointed tubercles of the same color as the body. 
Very few hairs. Stigmata very obscure. 
Fic. 4.—Larva and pupa. #2, mandible; z, antenne. . 
Pupa (Fig. 4): In autumn and winter white; in late spring black. Length 4.17" 3 
male 3.2™". In autumn the wing pads are very indistinct, hardly visible, but in 
spring they are plainly marked. 
This insect is very different from the Z. tritici (Riley), (first 
described in the Rural New-Yorker of March 4, 1882), in being 
much larger, in its black scape in antennz, black mesoscutum, 
black coxæ, light instead of yellow pronotal spot, the numerous 
males and the fact that all are winged. These work to the num- 
ber of from five to fifteen at one place in wheat stems, instead 0 
one or two, and the stalk solidifies. The larva has no teeth on 
its mandibles and only one joint to the tubercle-like antenna. It 
differs from Z. grande (Riley) but little in size; but in other 
_ respects the points of difference are much as above. i 
ea From the old joint-worm of Fitch (Z. hordei Harris) it differs 
= — in being larger, in having a black scape to antenna, black mouth- 
~ parts, and in working in great numbers in a single straw, in caus- 
_ ing the straw to solidify, in not forming a swelling and in work- 
_ Ing anywhere on the internodes of the straw. l 
__ From Z. elymi (French) it differs in being much larger, and the 
tegs are not so fully fuscous. Z. elymi works in grass, which 1S 
ably true also of this species, yet they must be quite distinct, 
; 1own by sizes. : j 
Dr. C. V. Riley kindly informs me that he thinks this is Z. 
‘ He sya he has specimens from Virginia, right where 
