|Pelecinus polyturator female|
Fortunately for us, she doesn't have a stinger, just an extended method of "laying" an egg. This is a female pelecinid wasp. They have elongated articulated abdominal segments (metasoma) with an ovipositor on the end. You will notice that the "ankle" is thicker than the leg segment above or below it. Also the antennae are very long, all typical of a female Pelecinus polyturator.
|June beetle grub - REK|
|P. polyturator male - Larry de March|
The wicked looking abdomen probably serves to protect the wasp from curious humans but even if she used it in defense it wouldn't penetrate your skin. It is more like a "Baby on Board" decal, so don't swat, just take pictures.
The June beetle grub is fascinating on its own, moving on its back by the use of hairs, its relatively useless legs flailing in the air. See this previous blog.
Thanks to Brian Hoover for the picture that started this topic and to Larry de March for the use of his photograph of the rarely seen male.