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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 » Thread-waisted Wasps (Sphecidae) » Sceliphrinae » Mud-dauber Wasps (Sceliphrini) » Black Mud-dauber Wasps (Sceliphron) » Yellow-legged Mud-dauber Wasp (Sceliphron caementarium)
Photo#186163
Very long, yellow and black thread waisted wasp - Sceliphron caementarium
Copyright © 2008 Arthur Scott Macmillan

Very long, yellow and black thread waisted wasp - Sceliphron caementarium
Sunnyvale, Santa Clara County, California, USA
May 28, 2008
Size: Around 25mm
except for the color, it reminds me a little of a blue mud dauber. It did not seem particularly skittish. There were honey bees and two types of bumble bees present.

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Very long, yellow and black thread waisted wasp - Sceliphron caementarium Very long, yellow and black thread waisted wasp - Sceliphron caementarium
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Contributed by Arthur Scott Macmillan on 29 May, 2008 - 7:17pm
Last updated 31 May, 2008 - 12:30pm

Black and Yellow Mud-Dauber (Sceliphron caementarium)
The petiolus of the gaster is yellow in the West.
… Richard Vernier, 29 May, 2008 - 7:39pm login or register to post comments

 
Thank you, for the ID, Richard
I wonder if these are the same as the "Mud Daubers" that I used to see a few miles from here when I was growing up. Those ones came out of holes in the ground (possibly abandoned ground squirrel holes), but the guide says that these make mud nests in sheltered areas such as eaves. That sounds pretty different,I know, but they were referred to as "mud daubers", were yellow and black, thread waisted, and if my memory serves me correctly they were very big.
… Arthur Scott Macmillan, 1 June, 2008 - 1:11pm login or register to post comments

very
nice images. i believe this is a black and yellow mud dauber, Sceliphron caementarium
… Vespula Vulgaris, 29 May, 2008 - 7:38pm login or register to post comments

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