Thread-waisted Wasp Segmented (ventral head) - Prionyx -
Tonopah Desert, Maricopa County, Arizona, USA May 10, 2015 Size: 22mm
These are images of a Thread-waisted Wasp, that I believe is a male Prionyx subatratus.
1) - The wing's submarginal cells are difficult to trace on these wasps and yet sometimes they can be used to verify a genus level ID.
2) - He has a globular shaped abdomen, with 7 segments.
3) - One key feature that I have noticed on several images in this genus (only) is a brown stripe along the inner-ventral margin of the hind tibia.
4) - There are thin, reddish stripes of lightened pigmentation on his foreleg femur's mid-ventral and even thinner stripes on the forward or basal side of his mid & hind coxa & trochanters.
5) - The clypeus has a semicircular depression on the mid-ventral edge & a matching suture line above that. Also some slightly reddish coloration can be seen on his hairy face.
Please confirm, move or frass these images. Thanks for your help!
Contributed by Bob Biagi on 2 September, 2015 - 8:59pm Last updated 5 September, 2015 - 11:31pm
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