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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » Orthorrhapha » Asiloidea » Bee Flies (Bombyliidae) » Bombyliinae » Bombyliini » Anastoechus » Anastoechus hessei
Photo#244082
Anastoechus - Anastoechus hessei
Copyright © 2008 Lynn Monroe

Anastoechus - Anastoechus hessei
Borrego Springs, San Diego County, California, USA
October 12, 2005
Size: BL ~ 10.5-11 mm
We find these black-tailed beeflies in the Borrego Sink nectaring on Alkali Goldenbush (Isocoma acradenia). The wing venation appears to be an Anastoechus. This year we saw dozens of them in the Mojave National Preserve on Rabbitbrush in early October.
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Contributed by Lynn Monroe on 9 December, 2008 - 9:17pm
Last updated 21 March, 2009 - 9:03pm

Moved
Moved from Anastoechus. Only one species has the black tail.
… John F. Carr, 21 March, 2009 - 9:03pm login or register to post comments

 
What about this one
Is it mis-IDed? Or am I missing something?
… John R. Maxwell, 22 March, 2009 - 11:37am login or register to post comments

 
Anastoechus species
This photo of A. melanohalteralis is the species I was concerned with when I tried to ID my Anastoechus. And this photo was identified by Neil Evenhuis.

How to separate it from A. hessei, when both of them had black tails? The key in Painter (1962) seemed to be the halteres, with black knobs and stalks entirely black in A. melanohalteralis. We did find a dead Anastoechus in 2008 and the knobs of the halteres were pure white. This is why I ID'd it and the live one we saw close by as A. hessei.
… Lynn Monroe, 22 March, 2009 - 8:55pm login or register to post comments

 
Out of range
I wondered about that one too. I decided it was a bit out of range for hessei and didn't quite have enough black. "Most" of the fur from the back of segment 5 to the tip of the tail should be dense and black for hessei. The other view shows the black is limited to a band.
… John F. Carr, 22 March, 2009 - 12:48pm login or register to post comments

Moved
Moved from Bombylius.
… Joel Kits, 12 February, 2009 - 10:35pm login or register to post comments

Moved
Moved from Bombyliini. (sorry, mis-move)
… Joel Kits, 12 February, 2009 - 10:35pm login or register to post comments

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