Ceraeochrysa Smithi)* (N Europtera I Chrysopidae I Parental Investment I Fatty Acids I Aldehydes)
Proc. Natl. Acad. Sci. USA Vol. 93, pp. 3280-3283, April 1996 Ecology Chemical egg defense in a green lacewing ( Ceraeochrysa smithi)* (N europtera I Chrysopidae I parental investment I fatty acids I aldehydes) THOMAS EISNERH, ATHULA B. ATTYGALLE§, WILLIAM E. CoNNER~, MARIA EISNERt, ELLIS MAcLEoDII, AND JERROLD MEINWALD§ tsection of Neurobiology and Behavior and §Department of Chemistry, Cornell University, Ithaca, NY 14853; ~Department of Biology, Wake Forest University, Winston-Salem, NC 27109; and IIDepartment of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801 Contributed by Thomas Eisner, December 21, 1995 ABSTRACT The green lacewing Ceraeochrysa smithi C. smithi. We found this chrysopid to lay its eggs in clusters, (Neuroptera, Chrysopidae), like other members of its family, in a characteristic spiral arrangement, with the egg stalks tilted lays its eggs on stalks, but it is unusual in that it coats these slightly toward the spiral center (Fig. 1 A and B). The number stalks with droplets of an oily fluid. The liquid consists of a of fluid droplets per stalk was in the range of 3-6 (Fig. 1 C and mixture of fatty acids, an ester, and a series of straight-chain D), with some variation depending on droplet size. We have, aldehydes. Relative to the eggs of a congeneric chrysopid that over the years, located a number of such clusters in the field lacks stalk fluid, the eggs of C. smithi proved well protected on various substrates, including fronds of palmetto (Serenoa against ants. Components of the fluid, in an assay with a repens, Saba! palmetto) and leaves of an introduced creeping fig cockroach, proved potently irritant.
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