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Stem Sawfly, family Cephidae

Stem Sawfly, family Cephidae
Monte Bello Open Space Preserve, Picchetti Ranch, Santa Clara County, California, USA
April 21, 2009
Size: ~12-14 mm
This wasp-like insect crawled around in the Ranunculus flower like a cat in catnip, sometimes burying its head between the stamens as if seeking nectar, sometimes as if it were trying to cover itself in pollen. It resembles some of the Tenthrenidids and Siricids on your site, but other sources suggest family Cephidae.(?) Cerci shown in more detail in accompanying shot.

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Stem Sawfly, family Cephidae Stem Sawfly, family Cephidae


Moved from Stem Sawflies.

Family is correct. Either Cephus or Calameuta. The two genera are similar and difficult to separate from pictures. Both are commonly attracted to yellow flowers.

it is cephid
its wing patern look likes cephids

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