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Photo#986999
Caterpiller, probably Hemileucinae - Coloradia doris

Caterpiller, probably Hemileucinae - Coloradia doris
6 miles NW Lyons, Boulder County, Colorado, USA
August 28, 2014
Size: BL ~ 42-52 mm
This large caterpillar was found on dirt right next to the concrete garage apron. The branched hairs are very distinctive, indicating probably a Hemileucinae. The one dorsal stripe is a pale but distinctive aqua. We have seen Coloradia pandora at this location, about 6400', but so far I cannot locate an image of an immature. Another possibility Is Hemileuca eglanterina as we have seen it at slightly higher elevations, but this cat does not seem to match any of the H. eglanterina cats in the BugGuide collection. Right now the cat is burrowing into sandy soil in the bottom of an aquarium. Any help with its ID is greatly appreciated.

I just checked out C. pandora cats in Lepidoptera of the Pacific Northwest: Caterpillars and Adults. Their cat has much shorter barbed hairs and the coloration and pattern seem quite different.

Images of this individual: tag all
Caterpiller, probably Hemileucinae - Coloradia doris Caterpiller, probably Hemileucinae - Coloradia doris

Moved-Coloradia
Moved from ID Request.

This is Coloradia, but not C. pandora. I was having trouble determining whether this individual represents C. doris or C. luski, which have rather similar larvae. Despite this, and based on location and this image http://bugguide.net/node/view/601258/bgpage (also my determination) I am leaning more towards C. doris. The link I provide is a larva from Utah, where C. luski is not known to occur as far as a I know, and based on the similarity between your larva and the one from Utah, C. doris seems likely.

 
Coloradia doris
Thanks so much for this ID. We are delighted to have this large caterpillar named! I was wrong when I said that we had seen C. pandora at this location (at lights in 2002). Actually we identified the adult as C. doris. And, the photo of C. doris in Powell and Opler was take in Boulder maybe 22 miles from us. We really appreciate your help.

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