. Bulletin. Agriculture. The Currant Fruit Fly. 209 SUMMARY OF DURATION OF STAGES IN LIFE HISTORY. The duration of the different stages in the hfe history, the mating, preoviposition, egg-laying periods and the longevity of the adults as determined under laboratory and field conditions are summarized in table 16. TABLE 16. Summary of Duration of Stages in Life History Under Laboratory and Field Conditions. stages in life history 1914 (days) 1915 (days") Egg period Larval period Pupal period (months) Mating period Preoviposition Egg-laying period Longevity of 6— 8 11—25
. Bulletin. Agriculture. The Currant Fruit Fly. 209 SUMMARY OF DURATION OF STAGES IN LIFE HISTORY. The duration of the different stages in the hfe history, the mating, preoviposition, egg-laying periods and the longevity of the adults as determined under laboratory and field conditions are summarized in table 16. TABLE 16. Summary of Duration of Stages in Life History Under Laboratory and Field Conditions. stages in life history 1914 (days) 1915 (days") Egg period Larval period Pupal period (months) Mating period Preoviposition Egg-laying period Longevity of 6— 8 11—25 10—11 38 6 36 29—31 * Lahoratory conditions. HABITS AND BEHAVIOR OF ADULTS. Feeding Habits. The only observation on the feeding habits of Epockra canadensis made in 1914, was that of a single female fly which was seen feeding on a currant flower on May 25. During the following season, the adults were frequently noticed lapping up honey-dew from plant lice infesting currant leaves. Starvation Experiments. A series of experiments were performed to determine the number of days that currant fruit flies would live in captivity on water and without water. Shortly after emerging from pupae, one lot of trypetids was confined in a glass jar with the top enclosed by cheese cloth. On the same day another lot of speci- mens collected in shady localities in the field was placed in cap- tivity in a similar glass container. Four times daily either dis- tilled or lake water was sjirayed thrnuoh the cheese cloth into. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Maine. Agricultural Experiment Station, Orono. [Orono. ]
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