Sawfly - Tenthredininae subfamily
Hymenoptera (Ants, Bees, Wasps and Sawflies) / Symphyta (Sawflies) / Tenthredinidae (Common Sawflies)
Females of this subfamily will often dine on smaller bugs in search of protein for building their eggs. The larvae, however, are completely herbivorous.
  Sawfly - Tenthredininae subfamily
Adult Female Sawfly
I watched this yellow female sawfly capture and eat a small beetle. My camera clock showed the entire process lasted 8 minutes; all that was left of the beetle was bits 'n' pieces. Please select a thumbnail for larger image.

Live adult sawfly photographed at West Chicago Prairie, DuPage County IL. June 15, 2005. Size: 10mm. One of the ways sawflies differ from other hymenopterans is that they do not have a narrow waist. The "saw" in sawfly refers to the saw-edged ovipositor (fig. 2) these insects use to cut slits into foliage wherein they lay eggs.

sawfly ovipositor
Figure 2. Sawfly ovipositor, Dolerus nitens


Cleaning antennae after meal
 

 


Paper Wasp
Polistes dominula

Great Black Wasp
Sphex pennsylvanicus

Cuckoo Bee
Nomada sp.

Bald-faced Hornet
Dolichovespula maculata
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