Panorpa

Panorpa
female P. vulgaris
male P. alpina
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Mecoptera
Family:	Panorpidae
Genus:	Panorpa Linnaeus, 1758
Species
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Panorpa is a genus of scorpionflies that is widely dispersed in the Northern hemisphere. However, they do not occur in the western United States nor Canada.

About 240 species are described as of 2007.

Larvae and adults feed on carrion.

The species P. vulgaris, has become a model insect for testing theories of sexual selection as its mating system has been noted to be similar to that of humans in some aspects. Studies show that both sexes of the species display mating preferences for direct (e.g. nuptial gifts) and indirect benefits (e.g. genetic benefits) to increase reproductive success. The production of nuptial gifts during copulation in males (e.g. salivary secretion) and high nutritional condition in females are indicators of "good foraging genes", an indirect benefit that individuals look for in their partners. These genetic benefits can increase fitness in offspring and improve their foraging ability.

The life-cycle of Panorpa nuptialis and its habits, have become of interest in the field of forensic entomology.

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Wikipedia