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Science 29 April 1977:
Vol. 196. no. 4289, pp. 524 - 525
DOI: 10.1126/science.196.4289.524
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Articles

Head Capsule Transmission of Long-Wavelength Light in the Curculionidae

JOHN R. MEYER 1

1 Department of Entomology, Cornell University, Ithaca, New York 14853

The head capsule of many weevils contains a region that transmits only far-red and near-infrared light. In the alfalfa weevil, Hypera postica, this extraocular cutoff filter evidently works in conjunction with the compound eyes, enabling the insect to use visual cues in locating or recognizing its host plant.

Submitted on September 17, 1976
Revised on November 9, 1976

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Science. ISSN 0036-8075 (print), 1095-9203 (online)