49] LEPIDOPTEROUS LARVAE— FRACKER 49 



FAMILIES OF LEPIDOPTERA 



a. Thoracic legs wanting or mere fleshy swellings. 



b Body fleshy and swollen at middle, fusiform; front closed above. 



PRODOXIDAE 

 bb. Body cylindrical or depressed, never fusiform. 



c. Head with ocelli of each side either six in number or reduced to 

 one ; front reaching vertical triangle, 

 d. Head with all ocelli small, subequal in size. 



e. Abdominal segments 3, 4, 5, and 6 with rudimentary prolegs, 

 each bearing several transverse bands of crochets. 



TISCHERIIDAE 

 ee. Abdomen either without prolegs or crochets or with crochets 

 on segments 3, 4, and 5. GRACILARIIDAE 



dd. Head with one large and conspicuous ocellus on each side. 

 e. Ocelli cephalic, located close to lateral angles of clypeus; 

 front triangular in outline. MICROPTERYGIDAE 



ee. Ocelli lateral, distant from lateral angles of clypeus ; front 

 quadrangular, 

 f . Front wider at caudal end than at cephalic ; body often de- 

 pressed and moniliform; prolegs not as in the alterna- 

 tive. GRACILARIIDAE 

 ff. Front narrower at caudal end than at cephalic; body 

 always cylindrical ; segments II and III and 2 to 7 bear- 

 ing prolegs without crochets (Fig. 93). 



NEPTICULIDAE 



cc. Head with two conspicuous ocelli on each side ; front not reach- 

 ing vertex. HELIODINIDAE 

 aa. Thoracic legs present and segmented, 

 b. Prolegs and crochets wholly wanting. 



c. Body fusiform ; head small but not greatly depressed ; front not 

 extending to vertical triangle, 

 d. Intersegmental incisions indistinct; scoli usually present; body 

 colored ; size large. COCHLIDIIDAE 



dd. Intersegmental incisions distinct; scoli never present; body 

 pale; size very small, 

 e. Kappa and eta distant or all setae wanting. PRODOXIDAE 

 ee. Kappa and eta adjacent; setae small but distinct. 



GELECHIIDAE 

 cc. Body usually cylindrical, always very small; head depressed 

 but not narrowed ; front extending to vertical triangle. 



COLEOPHORIDAE 



