IN WHAT EMBRYONIC STAGE DO THE EGGS OF NEODIPRION ENTER THE WINTER DIAPAUSE?

Abstract

This paper deals with the early embryonic development of Neodiprion banksianae Roh., N. nanulus Schedl., and N. sertifer Geoff., up to the initiation of winter diapause. Methods of preparation are described and the course of development is traced and described with the aid of two text-figures and two plates. The three species were found to enter diapause at approximately the same stage, but some differences in the details of their embryonic structure were discovered.