Wheel Bug?

Blairstown, NJ

I'm pretty sure this is a wheel bug, but can anyone tell me what the red protuberance is? As I was photographing him , I tried moving him with a leaf to get a better shot, and the insect moved the red things in and out.

Thumbnail by fozzi
Minot, ND

Yes, this most definitely is a wheel bug (Arilus cristatus).

Prairieville, LA(Zone 9a)

I think the protuberances are scent sacs....


Blairstown, NJ

Thank you both for your help.

Prairieville, LA(Zone 9a)

You are most welcome

Minot, ND

The red protuberances are mites, either phoretic ('hitchhiking) or parasitic; not scent glands.

Prairieville, LA(Zone 9a)

Sorry, Id'ing as "scent sacs" came from an article...and the same info is included in a number of other articles also.

"Scent sacs: Garman (1916) and Froeschner (1944) noted that wheel bugs, when captured, extrude (with little provocation) a pair of bright, orange-red scent sacs near the apex of the venter. These sacs give off a pungent scent. "



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