Larval Head Capsules of the Nantucket Pine Tip Moth1, 2

In studies of the Nantucket pine tip moth, Rhyacionia frustrana (Comstock), larval head capsule sizes and other parameters were gathered to provide basic information to aid interpretation of phenomena associated with the destructive stages of this insect. Nash and Fox (1969) were able to separate tip moth stadia and generations, with the help of Dyar's (1890) principle modified according to Beck (1950), in control studies by use of a parasitic nematode. However, further evaluation was suggested as a result of variation encountered in lepidopterous larvae, especially in the larval studies of the elm spanworm, Ennomos subsignarius (Hübner), by Drooz (1965).