. Proceedings of the thirteenth annual meeting of the Association of Economic Entomologists. orm appeared in south Georgia as early as April 18, and, indeed,winged individuals Avere found in great numbers in Atlanta on a plumtree that Avas not at first under observation as earh as May 1. All forms that have been observed to the present date are partheno-genetic. Only a small percentage of a colony would become winged,but winged individuals have continued to develop in every generationuntil the present date (August 14). After about twenty-four hoursfrom maturity the winged individ-uals leave th
. Proceedings of the thirteenth annual meeting of the Association of Economic Entomologists. orm appeared in south Georgia as early as April 18, and, indeed,winged individuals Avere found in great numbers in Atlanta on a plumtree that Avas not at first under observation as earh as May 1. All forms that have been observed to the present date are partheno-genetic. Only a small percentage of a colony would become winged,but winged individuals have continued to develop in every generationuntil the present date (August 14). After about twenty-four hoursfrom maturity the winged individ-uals leave the colony and estab-lish themselves, either singly orin groups of two or three, uponneighboring trees, where they feedfor several hours before giving birthto young. The terminals of succu-lent shoots were invariably selected,and the peach seemed to be pre-ferred to the plum; in fact, thewinged were never observed tolocate on the plum, although sev-eral plum trees were growing on thegrounds. It was never observed that thedirect offspring of the winged formdeveloped wings, but some individ-. FlG. 3.—Aphis n. sp: adult from wingedform, enlarged (from drawing fur-nished by Scott). uals of the second and succeedinggenerations usually do so. It was also observed that when a colony was kept reduced to asmall number of individuals no winged individuals would develop,but when allowed to increase to considerable numbers some suchwould always appear. On August 1-1 some of the colonies had been carried to the tenthgeneration from the winged. In order to get further assurance that an old species was not underobservation, specimens were taken from one of the breeding numbersand submitted to Mr. Pergande, who again identified the insect as anew species of the genus Aphis. It is desired to carry this breeding work on until the true males andfemales are secured before describing the species. Adalia hipunciaia frequented our breeding colonies in great num- 59 bers, and it was a continual
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectentomol, bookyear1902
