I am in dire need of the following pdf:
D.A. Roff 1990. The Evolution of Flightlessness in Insects.
Ecological Monographs 60 (4): 389-421.
Thank you very much for your help!
Alfred F. Newton, Curator Emeritus
Integrative Research Center (Insect Division)
Field Museum of Natural History
1400 South Lake Shore Drive
Chicago, IL 60605 USA
Telephone (direct): 312-665-7738; Fax (Zoology): 312-665-7754; Email:
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