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For Insects, Spiders & Their Kin
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Genus Tachytes

Green Eyed Hornet - Tachytes - male - female Square-headed Wasp (Tachytes guatemalensis)? - Tachytes guatemalensis - male Crabronid Wasp? Grasshopper - Tachytes - female Tachysphex? - Tachytes - female Oakland raider wasp - Tachytes distinctus - male Square-headed Wasp - Tachytes - female Wasp - Tachytes guatemalensis - female The Six Wasp Special - #2 of 6 - Tachytes distinctus - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
No Taxon (Apoid Wasps (Apoidea)- traditional Sphecidae)
Family Crabronidae
Subfamily Crabroninae (Square-headed Wasps)
Tribe Larrini
Subtribe Gastrosericina
Genus Tachytes
Explanation of Names
from the Greek Tachytes, meaning rapidity, suddenness, speed.
34 spp. in our area(1), ~300 worldwide(2)
7 - 19 mm long (3)
Characters: Green eyes distinctive for the genus. Antennae, black. Legs and wings, tawny color. Short, golden hairs on the thorax and head. Determining the correct gender, may often be critical to finding the species of your wasp.
A few look-alikes cannot be identified to species, without dissection or DNA verification. (see the BOLD Systems website, linked below) Range restrictions might help to narrow the choices. (see info tabs)
Keying info to be found here:

Some species have very dark eyes:

Some species have males with slightly modified antennae segments:
Basal: ♂ Apical: ♂
Grasshoppers, katydids
Life Cycle
Nests in sand
See Also
Some other green-eyed wasps, such as the Mole Cricket Hunters in the genus Larra look similar.
Many of the dark-eyed and blue-eyed wasps, in the genus Tachysphex also look similar. They are generally smaller in size, with a pointy abdomen and they lack a pygidial plate.
Internet References
BOLD Systems website - DNA verified collection page for specimens of the genus Tachytes (collected worldwide)
J. Kansas ENtomol. Soc.. Hilltoping Behavior by three Species of Tachytes