Stridulatory file (scannig electron micrograph) of Uhler's katydid. The file is on the underside of the left forewing. Here the forewing is ventral surface up; the 134 file teeth from a 2.8-millimeter row curving posteriorsly form lower left to upper center. See page 174. [Insect Attractants, Behavior and Basic Biology Research Laboratory, U.S. Department of agriculture,Gainesville,Florida; courtesy of P.S.Callahan and T.Carlysle]

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