Abstract
The degree of mandible abrasion was investigated in three species of adult short-horned grasshoppers reared on grass leaves and cabbage. Age estimation was possible from SEM photographs of right mandibles of female and male Chorthippus parallelus from eight age groups (0-7 weeks). More precisely, in this grass-fed species the incisor length/width ratio declined linearly with age. In two other species, Locusta migratoria and Pezotettix giornae, the length of the second incisor did not change markedly with age. We conclude that mandible wear is a useful measure for adult age in grass-feeding Gomphocerinae in the field.
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