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Spider Wasp - Entypus unifasciatus - female

Spider Wasp - Entypus unifasciatus - Female
Essex, Ontario, Canada
July 22, 2006
Size: 30 mm
I had forgotten about these wasps until I ran across them today. Haven't seen them since July, 2004. The female had what I think was a Wolf Spider and put it under exposed grass roots on a caved-in, sandy hill.


Same as other
Obviously an E. unifasciatus, as in your other photo.

How do you know it's a female?

A lot of specimens
When you look at a lot of specimens you get used to the differing proportions between males and females. Females are generally bigger have a proportionally larger head and more robust abdomen. Entypus unifasciatus is quite common in the area where I live and I've seen about 250 specimens just from Ohio (many more from other states). If you have a very good photograph (or a specimen in hand) you can also count antennal segments (females have 12, males have 13). Unfortunately the antennae in this photo are out of focus, but it's still a female just by judging proportions.

That's really interesting thanks alot. *Goes to write this down*

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