The Number of Molts of Lepidopterous Larvae

Two articles have already appeared in follows its own progression, we may PsycHF on this subject* and it is evi-conclude that this variation is actual; dent from a perusal of them that con-but if either set shows a lack of regular siderable confusion exists as to the progression that one we must regard number of molts of certain species, with suspicion. Corroborative observa- In this article I propose to establish a tions of the kind indicated are to be de- criterion by which different observa-sired and until we have them we can tions may be compared and errors de-not speak with confidence about the tected, for it is no difficult thing to number of molts of any species.