Abstract
The physiological age and developmental stages of terminal follicles were determined for females of 30 tabanid species (12 Chrysops , 8 Hybomitra , and 10 Tabanus ). During July 1974, 21 species were obtained in canopy trap and sweep collections; H. lasiophthalma was the most abundant species in the. canopy trap during June and July. Of 1789 females collected, 1523 were dissected to determine physiological age and stage of follicle development. Nullipars with follicles in stage II were most frequently collected; stage II ovarian diapause was found in most species. Populations of the following species were anautogenous: C. ater, C. callidus, C. indus, C. macquarti, C. vittatus, H. epistates, H. illota, H. lasiophthalma, H. nuda, H. sodalis, T. lineola, T. quinquevittatus, T. similis, T. sparus milleri , and T. sulcifrons . Fifty-five percent of parous specimens having sacstage follicular tubes had yolk deposited in terminal follicles, while 99% of pars with distinct “yellow bodies” had follicles in this condition.
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