A genus of Midges. S. pyri, Small Pear Midge. S. Schmid-bergeri, Large Pear Midge. When a fallen pear is cut open, it is often found core-eaten, and with a brown powder marking the progress of the assailant. This is caused by the larva of these insects. The midges appear early in July. M. Kollar says, that the small pear midge has club-shaped halteres, the club dark brown, and the stem whitish. When alive, the abdomen is of a lead colour, with black wings. The head and thorax are black, as are also the antennae ; the palpi are of a pale yellow, the feet whitish, and the tarsi black.

The Large Pear Midge appears about the same time as the preceding. M. Kollar thus describes it: "The female is little more than a line long, and half a line thick, also much larger than the smaller pear midge ; the male is more slender, and somewhat shorter. The antennae; are blackish, and not so long as the body. The head is black and shining, as is also the thorax ; the proboscis ash-gray, the abdomen of the male a deep black, that of the female browner, with black wings ; the anal point, however, is quite black. The feet ash-gray, and the tarsi and wings black. They both survive the winter, and deposit their eggs in the blossom, when it opens in early spring. The larva eats its way into the core of the young fruit, and again eats its way out at one side, when the time arrives for it to bury itself in the ground, and pass into the chrysalis form."-Kollar.