. The Canadian entomologist. Insects; Entomology. 248 THE CANADIAN ENTOMOLOGIST OVIPOSITION BY AN EVANIID, EVANIA APPENDIGASTER LINN. BY VERNON R. HABER, North Carolina State Dept. Agriculture, Raleigh, Recently the author and his wife witnessed oviposition by an ensign fly, Evania appendigaster Linn, in an egg mass of an Oriental cockroach, Blatta orientalis Linn. On Sunday evening, August 8, 1920, as the female Evaniid drank from a drop of water which accidentally had been spilled upon the floor of our room she was captured by inverting an ordinary glass tumbler over her, slipping a pie
. The Canadian entomologist. Insects; Entomology. 248 THE CANADIAN ENTOMOLOGIST OVIPOSITION BY AN EVANIID, EVANIA APPENDIGASTER LINN. BY VERNON R. HABER, North Carolina State Dept. Agriculture, Raleigh, Recently the author and his wife witnessed oviposition by an ensign fly, Evania appendigaster Linn, in an egg mass of an Oriental cockroach, Blatta orientalis Linn. On Sunday evening, August 8, 1920, as the female Evaniid drank from a drop of water which accidentally had been spilled upon the floor of our room she was captured by inverting an ordinary glass tumbler over her, slipping a piece of paper between the mouth of the tumbler and the floor upon which it rested. As this was done the Evaniid leaped upon the inside wall of the tumbler, soon becoming rather restless, for she ran over the inside surface of the glass and over the piece of paper upon which it rested. Fortunately we had at our disposal an egg mass of a cockroach, Blatta orientalis Linn, which had been deposited in the morning of the same day that we captured the Evaniid. By slightly tipping the inverted tumbler we. Fig. 23.—Oviposition of Evania appendigaster L. shoved the Blattid egg mass beneath it. Much to our surprise almost immediately there in bright electric lamp light the Evaniid left the inside wall of the con- fining tumbler, ran over the Blattid ootheca, crawled over the surface momentar- ily as she actively vibrated her antenna and finally settled upon it with the long axis of her body parallel with the long axis of the egg mass as it lay upon its right side. Having satisfactorily settled herself, lying upon her right side she ex- tended her ovipositor and crawling slightly forward she punctured the ootheca in the fifth egg cell of the left side, remaining in position for about fifteen minutes. She then left the egg mass and resting upon the inside wall of the tumbler actively cleaned the ovipositor, wings and antennae. Later, at I turned the ootheca that it rested upon i
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