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Family Mymaridae - Fairy Wasps

Hymenoptera, Mymaridae - Polynema - female Hymenoptera, Mymaridae  - Anagrus - male Gonatocerus - Cosmocomoidea ashmeadi Mymaridae, ventral - Acmopolynema - female Cosmocomoidea - female egg case on grass, cover removed - Anagrus Small Hymenoptera, Mymaridae? - Anagrus Fairyfly, dorsal-lateral  - Litus - female
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 Chalcidoidea (Chalcidoid Wasps)
Family Mymaridae (Fairy Wasps)
Other Common Names
Synonyms and other taxonomic changes
No generally accepted subfamily classification has been proposed(1)
>200 spp. in 32 genera in our area, >1400 spp. in ~100 genera worldwide(2)(1)
0.2-1 mm (among the smallest of insects)(3)
Fairly characteristic in habitus and do not closely resemble any other chalcidoids. The most easily observable characters are(2):
stalked, narrowly elongate hindwing
long clubbed female antennae (filiform in males)
greatly reduced venation which terminates within the first third of the wing (except in Arescon and Krokella)
no discernible stigmal or postmarginal vein
tarsi may be 4- or 5-segmented
antennal toruli widely separated
vertex surrounded by thickened bands of cuticle and separated from the face by a suture

Key to New World genera(4)
insects egg parasitoids(3)
Internet References
Boln. Asoc. esp. Ent.. Contributions to the Knowledge of the family Mymaridae.
Arthropod Fauna. Order Hymenoptera, family Mymaridae. John T. Huber, Gennaro Viggiani and Ricardo Jesu
"These Insects Are Smaller than a Single Cell...How?!" (SciShow) - delightful six and a half minute video clip loaded with info about this intriguing family.
Works Cited
1.Universal Chalcidoidea Database
2.A handbook of the families of Nearctic Chalcidoidea (Hymenoptera). 2nd Edition
Grissell E.E., Schauff M. E. 1997. Ent. Soc. Wash. 87pp.
3.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
4.Review of the genera of New World Mymaridae (Hymenoptera: Chalcidoidea)
Carl M. Yoshimoto. 1990. Flora and Fauna Handbook (Book 7), CRC Press.