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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » Aculeata - Ants, Bees and Stinging Wasps » Apoidea sans Anthophila – Apoid Wasps » Square-headed Wasps, Sand Wasps, and Allies (Crabronidae) » Square-headed Wasps (Crabroninae) » Trypoxylini » Trypoxylon » Subgenus Trypoxylon (Trypoxylon Subgenus Trypoxylon)
Photo#1607022
Square-headed Wasp - Trypoxylon
Copyright © 2018 iNaturalist

Square-headed Wasp - Trypoxylon
Cupertino, Lower Stevens Creek, Santa Cruz Mtns, Santa Clara County, California, USA
October 26, 2018
I find these all-black wasps on foliage (blackberry spp, stinging nettle, mule fat) and on wet rocks. They zip around and remind me of skinny grains of wild rice when they settle, which they occasionally do for a second or two.

Would like to know how you id gender.
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Contributed by iNaturalist on 27 October, 2018 - 10:12pm
Last updated 26 July, 2019 - 5:47am

Moved
Moved from Trypoxylon.
… John S. Ascher, 26 July, 2019 - 5:47am login or register to post comments

Moved
Moved from Crabronidae.

Have no idea how to determine the sex.
… Ken Wolgemuth, 27 October, 2018 - 10:17pm login or register to post comments

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