Changes in the quantitative and qualitative composition of the crop contents of the females Hybomitra nitidifrons confiformis (Diptera, Tabanidae) within 24 hours.

Analysis of the composition of crop contents in females of H. nitidifrons confiformins, caught on the 4th day in the period of hatching and emergence of the first imagos, was carried out. By the moment of catching all individuals did not complete a single honotrophic cycle, the number of ovarioles in ovaries was, on the average, 722+-21, and the primary follicles were at the 2nd stage of development. The method of highly effective liquid chromatography was used. At the moment of attacking the cattle the crop of most individuals contains 0.13 to 8.94 mg of sugars, mostly glucose and fructose, galactose being found in 29% of females. Carbohydrates absorbed by tabanids from nectar are the main source of energy necessary for the active flight and vital activity.