Aleiodes

The defining trait of the subfamily is a cyclostome mouth, a circular opening formed by a dorso-ventrally short clypeus and a concave labrum, bordered below by the mandibles. The first three abdominal segments are heavily sculptured, often with longitudinal ridges. Females are distinguished by a short ovipositor (sheaths are usually no longer than the hind basitarsus), making them distinct from other Braconidae groups.

There are thousands of species worldwide with about 40 UK species identified so far.

Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.

The females deposits eggs in caterpillars of various species. The eggs hatch and the wasp larva feeds on the caterpillar leaving a hardened skin, or mummy. The wasp pupates within the mummy and eventually the adult breaks out, leaving a small hole in the husk of the caterpillar.

Common and widespread. 

Under recorded due to identification difficulty.