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.
 
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
 

 

              
 
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