A PRELIMINARY STUDY ON TWO LARCH SAWFLIES

This paper describes two species of sawfly, Pristiphora wesmaeli Tischbein and P. lands (Hartig), in Bailing, Hei-Longkiang Province, which are new records in China. According to the field observation, P. wesmaeli has one or two generations a year, but in the laboratory, three generations a year in parthenogenesis. P. laricis has one generation in the field, two parthenogenerations in the laboratory and it diapauses in the summer. For identifying the species, besides the descriptions of adult, tabulars of eggs, larvae and the damage are prepared.