Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

BugGuide is a National Moth Week Partner. How to add your National Moth Week 2021 photos. July 17-25.

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 BugGuide 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.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Previous events


TaxonomyBrowse
Info
ImagesLinksBooksData

Family Evaniidae - Ensign Wasps

Ensign Wasp - Hyptia harpyoides [Ensign?] Wasp ID Request Evaniidae? - Evania appendigaster Unknown Ensign wasp - Evania appendigaster Black wasp with thin abdomen - Evania appendigaster - female Wasp - Evania appendigaster  Evaniidae Female Evania appendigaster? - Evania appendigaster - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Parasitica" - Parasitoid Wasps)
Superfamily Evanioidea (Aulacid, Ensign, and Gasteruptiid Wasps)
Family Evaniidae (Ensign Wasps)
Other Common Names
Cockroach Egg Parasitoid Wasps
Hatchet Wasps
Nightshade Wasps
Numbers
11 spp. in 4 genera in our area(1)(2)
Size
3-7 mm(2)
Identification
The gaster is very small and oval, attached by a slender petiole to the propodeum, considerably above the base of the hind coxae. It is carried almost like a flag (thus the name).
keys to NA taxa: Evanioidea Online

1. Hyptia - our only genus with the fore wing venation simple, forming a single enclosed cell; also unique in lacking or partially lacking notauli; species ranging from entirely black to entirely ferruginous


2. Evania - our only genus with the fore, mid, and hind coxae spaced evenly; our single species readily distinguished by its large size (at 5.5 - 7 mm forewing length, only rivaled by Prosevania fuscipes), entirely black body, and distinctive blue eyes


3. Evaniella - our only genus with the fore wing having multiple cells and a length of 5.0 mm or less; species often marked with ferruginous


4. Prosevania - our only genus with a large size (at 5.5 - 7 mm forewing length, only rivaled by Evania appendigaster) and close spacing of the mid and hind coxae; our single species only recorded from urban environments is further noted by its long scapes, robust thorax, and dark coloration often with brown on the extremities
Range
e. and sw. NA(2)
Habitat
Found in buildings or other places where cockroaches occur.
Food
Parasites of the egg capsules of cockroaches
Internet References
Works Cited
1.Catalog of Hymenoptera in America North of Mexico
Karl V. Krombein, Paul D. Hurd, Jr., David R. Smith, and B. D. Burks. 1979. Smithsonian Institution Press.
2.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.