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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Cucujiformia » Longhorn and Leaf Beetles (Chrysomeloidea) » Longhorn Beetles (Cerambycidae) » Cerambycinae » Ibidionini » Heterachthes » Heterachthes quadrimaculatus
Photo#520022
Unknown Longhorn Beetle - Heterachthes quadrimaculatus
Copyright © 2011 Jon Hart

Unknown Longhorn Beetle - Heterachthes quadrimaculatus
Montrose, Laurens County, Georgia, USA
May 19, 2011
Size: unrecorded
Found on oak leaf in forested area. I thought I knew what this was, but, it appears to not be what I assumed. It struck this pose just long enough for a few quick shots, then, typically, dropped off and flew away. These kinds of beetles are not very common in this area, obviously.

Images of this individual: tag all
Unknown Longhorn Beetle - Heterachthes quadrimaculatus Unknown Longhorn Beetle - Heterachthes quadrimaculatus
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Contributed by Jon Hart on 24 May, 2011 - 8:18pm
Last updated 11 November, 2020 - 10:56pm

Heterachthese quadrimaculatus
This one gave me some trouble - as it apparently did for others as well!! Something nagged at me about this, and the combination of long, erect setae and short spine on antennomere III did not match either of the eastern Psyrassa. This is actually a very poorly marked H. quadrimaculatus of which I've seen a few specimens like this. The pale basal markings are just visible - these are not present in any species of Psyrassa.
… Robert Androw, 11 November, 2020 - 11:01pm login or register to post comments

Moved
Moved from Branch Pruner.
… Robert Androw, 11 November, 2020 - 10:56pm login or register to post comments

must be it; hope Dr Thomas agrees
Moved from Psyrassa.
… v belov, 25 May, 2011 - 9:58am login or register to post comments

 
M.C. Thomas's opinion:
"The easiest character is the relative length of the spine on antennomere III but that is not visible in either picture. The other key characters is presence of dense white pubescence on the scutellum of unicolor. I don't see any in your first shot and am unsure if it's present in the second."

however, i think i can see that the spine is very short, just like in this specimen(1), and the earlier date is also consistent with P. unicolor, according to(2): May-Aug (vs Jun-Jul in P. pertenuis)

feel free to move it to the genus page, Jon
… v belov, 25 May, 2011 - 11:02am login or register to post comments

looks like unicolor...
Moved from Beetles.
… v belov, 25 May, 2011 - 9:54am login or register to post comments

Moved
Moved from ID Request.
… Jon Hart, 24 May, 2011 - 9:05pm login or register to post comments

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