Saturday, September 3, 2011

Cosmosalia chrysocoma

Here's a Rocky Mountain longhorn beetle, Cosmosalia chrysocoma. It's one of those variable lepturines with a fairly wide distribution (throughout Canada and in much of the Western US) but with populations that can look unique. It can often be found on flowers. I found this one on a thistle bud.

Some of individuals are much darker (with the black base color showing through the elytral pubescence). I have also seen specimens that almost look gold. I found this one just before dusk up American Fork Canyon (in the same place as the giant ladybird beetle of my last post).

The habitat is spare scrub oak and sagebrush with Douglas fir and boxelder along the canyon floor. It's always a good day when you find bycids about.

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