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Photo#736562
Mystery wasp or bee on Erigeron sp  - Nomada - male

Mystery wasp or bee on Erigeron sp - Nomada - Male
6 miles NW Lyons, boulder County, Colorado, USA
June 5, 2009
Size: About 12 mm body length
I have three wasps or possibly bees that we saw within a one week period in June, 2009. Although each is different in many details, they all share many similarities. This is the first one, photographed on 5 Jul 2009. It is black, red and yellow with a black hairy vertex and thorax. The venation is distinct and has 3 submarginal cells. The bumps or knobs on the thorax between the wings are red. It is the largest of the three insects at about 12 mm.

Moved
Moved from Nomad Bees.

Moved
Moved from ID Request.

Maybe something like
Nomada

 
Thanks! You are right!
I checked out Nomada in the BugGuide search and saw #404270, a Nomada bee from a neighboring county. It is complete with the red bumps on the thorax. Interestingly, it is identified by John Ascher as a male in the Nomada erigeronis species group, and I found "my" nomada on an Erigeron species. The venation always looked beelike, though the insect itself seemed more wasplike.

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