[NatureNS] Hover Flies

Date: Sat, 07 Apr 2007 21:12:21 -0300
To: NatureNS@chebucto.ns.ca
From: Angus MacLean <angusmcl@ns.sympatico.ca>
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I know, it's not fly season yet but I have been reviewing some 
pictures from last fall and would appreciate any input.

Most of these photos are of Eristalis transversa but I wonder about 
the white (rather than orange) abdomen banding. Is this a mark of age 
or of gender (i.e. male). Also none had a orange scutellum (that half 
circle at the rear of the thorax). Do all eventually acquire this?

There are six photos of transversa. Double-click for a larger pic.

http://www.flickr.com/photos/58321572@N00/

Another one appears different and I think it is E. dimidiatus. Anyone 
confirm this or have other ideas?

http://www.flickr.com/photos/58321572@N00/449933911/

Angus


  

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