Great Black Wasp - Sphex pensylvanica
Order Hymenoptera / Suborder Apocrita / Superfamily Sphecoidea / Family Sphecidae
Live adult female wasp photographed at Winfield Mounds Forest Preserve, DuPage County IL USA July 4, 2005.
Size: 35mm
 


Sphex Pensylvanica, commonly called katydid hunter or great black wasp


Katydid Hunter

This predatory wasp generally preys on katydids (family Tettigoniidae) in genera Microcentrum and Scudderia. A female wasp will dig a burrow and provision it with 1-3 insects, laying a single egg upon each one. When the eggs hatch, the resulting larvae feed on the still-living but paralyzed host. (Eew).

This female wasp is the largest I've ever seen - I've measured it accurately at 35mm (males are smaller). It actually makes a rustling sound when it flies, the wings are so large - reminiscent of the sound a mantis makes when lumbering into the air. Awesome!

I often wonder why this wasp's compound eyes do not present anything but a flat, glossy surface. Many bees in the Hymenoptera family Halictidae, praying mantids, various butterflies, dragonflies and many other arthropods' eyes exhibit "pupils" or other geometric or refractory patterns.

 


Paper Wasp
Polistes dominula
Tricolored Bumble Bee - Bombus ternarius
Tricolored Bumble Bee 
 Bombus ternarius

Cuckoo Bee
Nomada sp.

Bald-faced Hornet
Dolichovespula maculata
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