Thank you for including a mention of the red flour beetle in your article on sources of genetic variants (The Scientist, Sept. 30, 1991, page 23). Our laboratories have been collaborating to develop this insect further as an experimental system, and we appreciate that you have publicized the availability of these genetic stocks.

In addition to mutants of Tribolium castaneum, this collection includes many lines isolated from the wild of this and other species of insect pests attacking stored products. It is housed at the U.S. Grain Marketing Research Laboratory. Requests should be directed to U.S. Grain Marketing Research Laboratory, U.S. Department of Agriculture, Agricultural Research Service, 1515 College Ave., Manhattan, Kans. 66502.

U.S. Department of Agriculture
Agricultural Research Service
Manhattan, Kans.

Division of Biology
Kansas State University
Manhattan, Kans.

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