Contents

13 October 1972
Vol 178, Issue 4057

About The Cover

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]