STATE AGRICULTURAL SOCIETY. 
531 
those of the other groups of the extensive Family Muscidje in the 
Order Diptera, by their small size, by having the last joint of 
their antennae globular insead of ovakor oblong; by being desti¬ 
tute of winglets, those small scale-like appendages which occur 
at the base of the wings, having some resemblance in their shape 
to the bowl of a spoon; and the veins and veinlets of the wings 
being as they are represented in the accompanying figures. 
One of the prettiest of the flies of this group, which we meet 
with upon growing wheat the latter part of June, pertains to the 
genus Meromyza , which is readily known from the other genera, 
by having the thighs of the hind pair of legs thick and appearing 
as though they were swelled. It is very similar to the European 
M. saltatrix Linn., but is larger, the stripes on its thorax are 
deeper black than those upon its abdomen, and here it is the 
latter stripes which are united or confluent at their ends and not 
the former. It may be named 
The American Meromyza, M. Jtmericana. It is 0.17 in length to the tip of its 
abdomen, and 0.20 to the end of its wings. It is yellowish white with a black spot 
on the top of its head, which is continued backward to the pedicel of the neck. 
Thorax with three broad black stripes, approaching each other anteriorly but not 
coming in contact, the middle stripe prolonged anteriorly to the pedicel of the neck 
and posteriorly to the apex of the scutel. Abdomen with three broad blackish 
stripes, which are confluent posteriorly and interrupted at each of the sutures. 
Tips of the feet and veins of the hyaline wings blackish. Eyes bright green. An- 
tonme dusky on their upper side. 
Another jninute pretty fly, often found with the preceding 
upon wheat, and resembling it in its colors, is generically dis¬ 
tinguished from it by its short, thick body, its abdomen, when 
distended by a recent meal, being perfectly spherical and ab¬ 
ruptly drawn out at its tip into a conical point. The second 
veinlet of its wings, moreover, is very oblique instead of being 
transverse as in all the other genera of this group. It thus be¬ 
longs to Macquart’s genus Sip/ionella, and the present species 
may be named in allusion to its plumpness 
I* The obese SinioNELLA, S. obesa. It measures only 0.09 in length, to the tip of 
its abdomen and 0.12 to the end of its wings. It is black and polished, with a slen¬ 
der stripe on the middle of the thorax, the scutel and the under side of the body 
bright sulphur yellow, the abdomen having a tinge of green beneath. Legs bright 
tawny yellow. Head yellowish white. Antennm tawny yellow, their tips black. 
Two dots on the anterior edge of the mouth, a large egg-shaped spot on the crown 
two short stripes low down on each side of the breast, and the anterior pair of 
feet, black. 
