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What bug is this?
Location:  Northern California, USA
September 5, 2010 1:41 am
We keep finding these bugs around our house. They are coming from the outside, they come in when we open the doors or windows. They are also all around the outside of the house and the walls outside of the house. Some are brown with a yellow stripe on its back. They move fast, so we thought they might be some kind of roach, but we are not sure what kind of bug it is.
Signature:  Carly

Cockroach

Hi Carly,
We did not recognize your Cockroach, which we had believed to be an immature nymph, but we located it on BugGuide, and it is a recently introduced species that has become established in California, and it is a wingless species, Phyllodromica trivittata.  According to BugGuide it is:  “Recently introduced into California, apparently now in Marin, Petaluma and Cotati” and “Reports of high abundance both indoors and outdoors make it likely that reproduction is occurring outdoors with subsequent invasion of nearby structures. As this species adapts to this new environment, studies will need to be conducted to confirm this.”  BugGuide also reports:  “Known from dry habitats around the Mediterranean. It has been recorded from Morocco; Algeria; Spain; Italy (Sardinia Island); Italy (Sicily); Libya; and Israel. Given that it has not been recorded as being a pest in buildings in those countries (as far as I’m aware) it is unlikely to invade buildings in the USA. Comment by George Beccaloni (The Natural History Museum, London, UK).”

Cockroach

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