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Photo#1312880
Black longhorn with Mannophorus laetus on Viguiera stenoloba - Mannophorus laetus

Black longhorn with Mannophorus laetus on Viguiera stenoloba - Mannophorus laetus
Yturria Brush LRGV NWF, Hidalgo County, Texas, USA
October 31, 2016
Size: Bl ~12 mm
This black longhorn is on the same Viguiera stenoloba flower as the Cerambycinae longhorn Mannophorus laetus in thornbush shrub habitat. I tried to browse for an ID but black insects are tough. I think this is a female, because in the next image the Mannophorus laetus longhorn jumped on its back and mated with it.

Images of this individual: tag all
Black longhorn with Mannophorus laetus on Viguiera stenoloba - Mannophorus laetus Black longhorn with Mannophorus laetus on Viguiera stenoloba - Mannophorus laetus

Moved

probably both conspecific
the female may just be melanic (unless there is sexual dimorphism with this species?!?)

 
Very possibly
I started comparing the ridges of the abdomen. They seem to be the same, except the male ridges are colored red. You are probably right, although this is not the norm. We have seen many of the bright individuals, including at least 4 mating pairs where both individulas had the bright coloration. This is the only black individual we have seen. Thanks for your comment.

 
Very possibly
I started comparing the ridges of the abdomen. They seem to be the same, except the male ridges are colored red.

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