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Photo#346779
Euclea delphinii? - Euclea

Euclea delphinii? - Euclea
Spring, Harris County, Texas, USA
October 25, 2009
Size: 2 to 3 cm
I believe this to be Euclea delphinii, but am not certain. If so, which instar does this represent? I'm very much an amatuer at identification, but so much enjoy photographing unusual larvae when I come across them in the field. This happens to have been spotted on the side of a white car (hence the isolated background). I wasn't sure exactly what it was or the foodplant, so I carefully relocated it to the nearest greenspace. Also, there seems to be some slight discoloration on the side in small, beige patches. Could this be parasitic activity?

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I think you are correct
In the Wagner's guide, there are only two caterpillars with this general appearance. The stinging rose (Parasa indetermina) has four longitudinal pinstripes on the sides of the body, which yours does not, and E. delphinii looks much more like this along the sides.

Of course, I'm a slave to the Wagner guide. As far as I'm concerned if there's another possibility that isn't in the book, it doesn't actually exist.

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