STATE AGRICULTURAL SOCIETY. 
773 
MIDCE. ELY. YAItlATlOKS OP THE VEINLKT. 
Now, the question at issue is, does this small veinlet, cross¬ 
vein, or transverse nervure, exist in the wing of the wheat 
midge ? In my figure of the willow gall-midge, published a few 
months before this, as an introductory to my essay on this insect, 
no such veinlet was represented, nor in my figures of the Hessian 
fly, published the year after. But, as just stated, it was repre¬ 
sented in these figures of the wheat midge, and in the text of 
my essay, in describing the outer vein or nerve, I said, “ From 
its middle it sends a small connecting nerve backward to the 
post-costal.” Mr. Curtis, however, does not represent any such 
veinlet, nor could M. Amyot or M. Lucas detect it on a most 
careful scrutiny, either in several French specimens preserved in 
alcohol, or in two specimens sent from me gummed upon card. 
In the insects of both countries M. Amyot perceives the slight 
elbow to the middle vein, which my enlarged figures show, and 
is led to think I may have supposed from this circumstance that 
a veinlet was given off at this point. 
I, on the other hand, may well ask, how an elbow comes to be 
formed here, if no veinlet is given off at this point ? For, so far 
as I have observed, in all those species of Cecidomyia in which 
there is no veinlet the middle vein is perfectly straight; whilst 
in those having a veinlet, this vein is always perceptibly 
elbowed. I may add that the bend or elbow in the middle vein 
appears to be slightest where the veinlet is placed transversely, 
greater where it is oblique, and greatest where it is longitudinal, 
the angle formed at this elbow being about 135 degrees in one 
species known to me, in which the veinlet forms a perfectly 
straight line with that portion of the middle vein which is back 
of it.* 
* The species alluded to probably should be described in this place; and it may well be 
named in honor of one who has brought this cross-veinlet so prominently to notice, as furnish¬ 
ing an important distinctive mark of the species in this largo and difficult genus. 
Cecidomyia Amyotii. —Female, 0.08 long; wax yellow; thorax anteriorly dusky or 
with three dusky stripes; antennm one-third the length of the body, black, of eighteen (?) 
joints, not separated by pedioels, the joints globular, those towards the base becoming 
longer and turbinate; legs blackish, inside yellowish gray; wings smoky, with a veinlet, 
which is longitudinal and rectilinear with the middle vein back of it. Three individuals 
taken June 13th, in the evening, around a lamp. 
In this species the outer vein is bent like a bow, whereby the cubital cell is elliptio and 
pointed at its base the same as at its apex. The middle vein forward of the elbow is flexuous, 
running from the elbow first inward and forward to its junction with the inner middle vein, 
ln tt straight line with which it then extends forward and slightly outward till near its base it 
again curves inward. Hereby the basal cell is broader towards each end than in its middle. 
The inner middlo vein is straight, and very distinct where it is given off from tho middle 
