100 More Species #40: Slender mantisfly
Aug. 5th, 2012 09:04 am
Slender mantisfly Leptomantispa pulchella with unidentified passenger.
I stared at my photos for a long time, and looked at the bugguide.net criteria for identifying Mantidflies for a long time. I'm prepared for my bug buddies to tell me I'm wrong, but I think I've got this one. A mantidfly (or mantisfly, which feels nicer to say) is neither mantid nor fly, but instead belongs to the group of insects that includes lacewings and antlions.
These are really neat little animals that I'd love to study more. They are less than a half-inch long, but are tough predators in their world. Those raptorial forelegs snatch up smaller insects just as those of a true mantid. And their development from egg to adult goes through one more stage than insects with "complete" metamorphosis--they have hypermetamorphosis.
If I have the species right, the life cycle goes something like this: after hatching, the very active larva seeks out a female spider and climbs on board, drinking her haemolymph. (Apparently they can parasitize male spiders too, but have to make the transfer when the spiders are mating.) Then as the spider makes her egg case, the mantisfly larva crawls in, changes into a sedentary grub, and feeds on spider eggs. Out from the egg case hatches not spiderlings but an adult mantisfly.
Isn't nature grand?
