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Genus Ophion

Ichneumon - Ophion Insect - Ophion Ichneumon Wasp - Ophion Scorpionfly? Hangingfly? - Ophion wasp - Ophion Short-tailed Ichneumon Wasp? - Ophion - female Ichneumon Wasp - Ophion Ichneumon wasp? - Ophion
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Parasitica" (parasitic Apocrita))
Superfamily Ichneumonoidea (Braconid and Ichneumonid Wasps)
Family Ichneumonidae (Ichneumonid Wasps)
Subfamily Ophioninae (Short-tailed Ichneumonid Wasps)
Genus Ophion
Synonyms and other taxonomic changes
Ophion Fabricius, 1798
Explanation of Names
A name from Greek mythology--Ophion (Ὀφίων), was the first of the Titan gods to rule the world (Encyclopedia of Life).
Numbers
In the Nearctic region, 17 species are currently described (Yu et al., 2012; Schwarzfeld & Sperling, 2014), although it has been estimated based on morphology that there are approximately 50 Nearctic species (Gauld, 1985) and recent molecular analyses suggest there are many more (Schwarzfeld & Sperling, 2015)
Size
10-19 mm
Identification
From "The Audubon Society Field Guide to N. American Insects & Spiders"(1): "Abdomen long, compressed on the sides. Body pale yellow to reddish brown. Antennae and legs long, pale. Ovipositor of female barely visible at tip of abdomen. Wings clear."
Comment by Rachel Behm:
Fore wing with vein r-rs at most slightly broadened basally, never abruptly curved; ramellus usually well-developed.

Base of T2 with distinct median raised area that is semicircular or subtriangular in shape and bounded by weak impression.

Occipital carina complete

Fore tibial spur with membranous flange along its mesal face on posterior side, this in addition to similarly-shaped antennal brush of closely-spaced setae on anterior side
(Source: Subfamily OPHIONINAE By Ian D. Gauld & David B. Wahl http://www.amentinst.org/GIN/Ophioninae/)

Males:



Females:

Range
Holarctic
Habitat
Forest canopies and shrubby fields
Season
Adults are seen year-round. BG records show adults in all months of the year in southern states and California.
Food
Most all Ophion larva are parasites of caterpillars.
Life Cycle
Adult Ophion species will hunt for their host caterpillar. Usually one egg is laid per host. Caterpillar usually dies during pupal stage though wasp larva remains to pupate itself.
Remarks
The Ophion species are one of the most common Ichneumon wasps in the U.S.
"Ophion is by far the most abundant and diverse ophionine genus in virtually all habitats across the Holarctic region (Gauld, 1980, 1988)"- Schwarzfeld et al 2016
They are often attracted to artificial lights
See Also
Enicospilus can be superficially similar.
Note the difference in wing venation:
Ophion

Enicospilus

Netelia
Print References
"The Audubon Society Field Guide to N. American Insects & Spiders", page 810, plate 445(1)
"A Field Guide to the Insects of America North of Mexico", page 322 describes Ichneumons, with an illustration of an Ophion sp. on 323 (2)

Schwarzfeld, Marla D. et. al. 2016. Molecular phylogeny of the diverse parasitoid wasp genus Ophion Fabricius (Hymenoptera: Ichneumonidae: Ophioninae). Systematic Entomology 41:191–206 (online at CNC)
Internet References
Texas A&M University - talks about Ichneumons in general with details on the Ophion species
Insects of Cedar Creek - has info on Ichneumons with a photo of an Ophion species
Works Cited
1.National Audubon Society Field Guide to Insects and Spiders
Lorus and Margery Milne. 1980. Knopf.
2.A Field Guide to Insects
Richard E. White, Donald J. Borror, Roger Tory Peterson. 1998. Houghton Mifflin Co.