Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
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Upcoming Events

Interested in a 2022 BugGuide gathering in New Mexico?

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Previous events



Eastern Pondhawk pterostigma - Erythemis simplicicollis - male Eastern Pondhawk pterostigma--detail - Erythemis simplicicollis - male Spangled Skimmer, male - Libellula cyanea - male Band-winged Meadowhawk - Sympetrum semicinctum - male Four-spotted Owlfly - Ululodes quadripunctatus - female Helophilus sp, Iowa, April - Helophilus fasciatus Large spotted Green Lacewing--pterostigma - Leucochrysa insularis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
No Taxon (Glossary)
No Taxon (P)
No Taxon pterostigma
Explanation of Names
From Greek ptero, a wing, and stigma, a mark.
pterostigma noun - The name given to the second costal cell of the wing when it is opaque. Sometimes simply called stigma, though this is imprecise. Often prominent in Odonata (dragonflies and damselflies).
See Also
Internet References
Wikipedia: Pterostigma