INTRODUCTION 



Fig. 2. A. Head of a typical Moth, showing proboscis formed by 

 flexible maxillae (g) between the labial palps (p) ; c, face ; 

 , eye ; the structure m has been regarded as the vestige of a 

 mandible. B. Basal part (b) of maxilla removed from head, 

 with vestigial palp (p). Magnified. 



Fig. 3. Head of Caterpillar of Goat-moth (Cossus) seen from 

 behind. At, feeler; Mn, mandible; MX, maxilla; Lm, labium, 

 spinneret projecting beyond it. Magnified. After Lyonet 

 from Miall and Denny's Cockroach. 



