Unknown bug next to American cockroach
Location: So Cal Hi Desert City of Adelanto zip 92301
July 30, 2011 7:54 pm
I was having trouble with the American cockroach in my lawn, but not in the house. This morning I sprayed around the house and the lawn and I found this dark brown striped bug by some dead cockroaches. What is is? I only found one so far as compared to many dead cockroaches that came out of my lawn after I sprayed.
Signature: Bill Riechel
These are both Cockroaches. The individual you are calling the American Cockroach is lighter than we would expect. How large was the dark brown striped Cockroach? American Cockroaches are quite large. We are going to try to get some assistance from Eric Eaton on this identification.
As we continued to browse BugGuide, we found this unidentified Cockroach from Riverside California. This may be a new introduction, or a newly discovered native species. Hopefully, we will get some additional information.
Eric Eaton provides and identification
August 1, 2011
Male (right) and female (left) Turkestan Cockroach, Blatta lateralis. They are a common “outdoor” roach in urban areas here in Tucson.
Ed. Note: See BugGuide
Update from Bill
August 3, 2011
Subject: Turkestan Cockroach
Location: Adelanto, CA 92301
August 3, 2011 3:45 pm
When I wrote the other day for bug ID I was wrong on the lighter color cockroach as I thought it was an American, but is only about 1” long and in my research I found that it is the male Turkestan cockroach. I have now caught a female and have attached a set of photos here, but in al my searching I was never able to ID the bigger striped bug which is about 1.5” long.
Signature: Bill Riechel
Ed. Note: August 4, 2011
We are in agreement with Bill that he now has a pair of Turkestan Cockroaches, and we feel that the previously submitted images contain the unknown Cockroach that is similar to one posted to BugGuide. We are going to recontact Eric Eaton to ask him to revisit his original identification.
So you don’t think it could be a drown female that is bloated as per Eric’s answer?
The body segments match in number and the strip on the wing buds is the same and if it was swollen then the head maybe pushed out from under its protective shell. I don’t know!
I am going to try and catch a live female and drop her in a bucket of water for a couple of days to see if I can duplicate the swelling effect from drowning.
Last night I inspected my lawn area where the heaviest concentration of the roaches were and even with a flash light I could find none, nor did I even see any possible movement. I used “Bayer Advanced Complete Insect Control” in the quart bottle that attaches to you hose. I did all around the house 2 feet up the stucco and 2 feet out from the house on my gravel that surrounds most of the house and my lawn.
I then sprayed “Ortho Home Defense Max” around the house at the bottom of the stucco where the stucco breather strip is. The next morning when I walked around the house I found more dead Turkestan males, 3 dead black widows and a few dead silverfish.
I have only seen 9 females as compared to numerous males. What is the normal ratio of females to males?
Thanks for all the help!
Eric Eaton confirms his original identification
The “unknown” roach is a bloated, probably drowned, female Turkestan Roach, plain and simple.
Update: Scientific Experiment verifies identity
August 8, 2011
Hi Daniel & Eric:
I found a female Turkestan cockroach and put her in a cup of water and it took two days for her to swell up and expose the white bands of her body segments, also her head came out from under the protection of the shell to look just like the one I pictured for ID.