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Photo#616396
Sminthurinus sp. - Sminthurinus elegans

Sminthurinus sp. - Sminthurinus elegans
Long Beach, Los Angeles County, California, USA
February 24, 2012
Size: .5mm
There appears to be two forms of this population, a mostly black form and a markedly yellow-and-black form which appears to be more rare. I havn't got any good photos of the second form, but here is a bad photo if it helps aid in the identification. I am curious if the two forms relate to sex, age, genetics, or some other thing? Found in leaf litter.

Moved

Sminthurinus elegans
Collembola tend to become darker when they grow older. The characteristic pattern (as seen in the more pale form) is present but hard to recognize...

 
Thanks Frans
For both the explanation and the ID. Guess the population around here right now is very old, perhaps around spring more yellow forms will begin to show up.

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