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wasp with clubbed antennae - Pseudomasaris vespoides - male

wasp with clubbed antennae - Pseudomasaris vespoides - Male
Sonora Pass, California, USA
July 2, 2006
The only other kind of wasp I've seen with clubbed antennae is a Cimbicid, and this is something different. At first I thought it was a syrphid, but it has 2 sets of wings, and wasp eyes.

Moved from Pseudomasaris.

Pseudomasaris vespoides
ID by Roy Snelling, Natural History Museum of Los Angeles County.

Thanks Hartmut!!!
That's great to get it down to species.

Thank you,
for being in the right place at the right time, taking the picture, and submitting it. These are fascinating insects.

I think this a Masarine. If it is that group they provision mud nests with pollen rather than other arthropods. I think there is only one genus (unless taxonomy has changed), Pseudomasarus.

I believe it is spelled "PseudomasarIs" with an 'i.' Sorry, being a writer I am a stickler for this kind of thing:-)

Oops...just a typo.
I don't use proper keystrokes (hit U instead of I) and my post was poorly proofread...either way a writer should be obligated to comment:-)

I was excited about seeing a Masarine that I forgot to give a good reason why it's not a sawfly. The attachment between the thorax and abdomen looks broad but there is in fact a very close, narrow attachment. Additionally the wing venation is a little too reduced to be a symphytan and there are at least eleven antennal segments that I can count (Cimbicid sawflies have less than nine, by the way). The two submarginal cells are distinctive for this group (be it family or subfamily within the Vespidae, all other Vespids typically have three submarginal cells). The clubbed antennae are yet another pretty distinctive character for this wasp.

I can only understand...
Your enthusiasm about this superb potograph. This one male is very similar to the female posted last month by Adalbert Goertz from Colorado, except for the spectacular antennal dimorphism: this latter can be assessed at best by comparing both pictures.

Ooops. My bad.
Ooops. My bad.

That's another great explanation about this wasp. I had no idea what it was, so thanks for identifying yet another wasp for me.

wow wow wow!
That is one cool lwasp!
You must be correct that it is a sawfly of some type. That broadly joined abdomen and the clubbed antennae are unmistakable.

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