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....

http://bugguide.net/node/view/701135/bgimage

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. "

http://livingwithinsects.wordpress.com/2012/07/22/wheel-bug-scent-glands/

http://www.freshfromflorida.com/pi/enpp/ento/entcirc/ent143.pdf

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