. Biennial report of the Oregon State Board of Horticulture ... Horticulture -- Oregon; Fruit-culture -- Oregon; Gardening -- Oregon. APPENDIX. 327. Kiy;. 2">—Larva of fourth series just born from wingless aiul iisuniic female of third series: enlarged. the third series. It is certain that of the descendants of the second series a considerable proportion become winged, but not nearly so many as in the first series. There is no difference between the winged forms now maturing- and those produced in May. The parthenogenetic wingless females of the third series are similar to those of the
. Biennial report of the Oregon State Board of Horticulture ... Horticulture -- Oregon; Fruit-culture -- Oregon; Gardening -- Oregon. APPENDIX. 327. Kiy;. 2">—Larva of fourth series just born from wingless aiul iisuniic female of third series: enlarged. the third series. It is certain that of the descendants of the second series a considerable proportion become winged, but not nearly so many as in the first series. There is no difference between the winged forms now maturing- and those produced in May. The parthenogenetic wingless females of the third series are similar to those of the second series, but the honey tubes are shorter, the tail is longer and more slender, and it does not quite reach the same size. The antenna? are six-jointed, there is a sensory pit at the end of the fifth joint, and a group of four, all very distinct, is on the sixth joint. Day after day, until June 13, these forms increased in number, and at that time those of the second series had disappeared. It was hopeless now to attempt to follow out individual series, and all that could be done was to recognize different types, prevailing at different periods. It was not realized that there was any notable difference except, possibly, in size, otherwise it would have been easy to colonize individuals of each brood upon other trees previously freed of all other types. So it is not possible to speak delinilely of the length of time required for an individual to come to maturity, but I am inclined to believe that none develop so quickly as do those of the second series. In fact, judging from the pre- served specimens and from the Held notes, new series ap- peared at intervals of about twenty days. June 13, none of the second series remaining, the newly- born larvae were all from the third series. They had short, barrel-shaped honey tubes, four-jointed antenna? without sensory pits, and did not offer other characters differentitlting them from previous forms. In the second stage the honey
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