55] LEPIDOPTEROUS LARVAE — FRACKER 55 



setae but sometimes with cornicula. 



NOTODONTIDAE 

 ii. Secondary setae absent or sparse; primary setae 

 always distinct, tho sometimes small, 

 j. Kappa at about the same level on abdominal seg- 

 ments 6, 7, and 8; setae very small; no 

 humps, horns, or minute cuticular processes 

 present. (Doa). ARCTIIDAE 



jj. Kappa much lower on segment 7 than on seg- 

 ments 6 and 8 (Fig. 31). 

 k. Suranal plate terminating in an acute process 

 and anal prolegs wanting (Fig. 89) ; crochets 

 in a pseudocircle (Fig. 97). 



PLATYPTERYGIDAE ^^APJo^muM 

 kk. Suranal plate rounded posteriorly; crochets 

 in a mesoseries. 



I. Body covered with minute cuticular pro- 



cesses; form cylindrical except for a dor- 

 sal gibbosity on abdominal segment 8; no 

 stemapoda or horns present. 

 1. DIOPTIDAE 



II. Body not covered with minute processes; 



horns, stemapoda, or gibbosities usually 

 present. NOTODONTIDAE 



ff, Verrucae (Fig. 88), at least mu, well developed, distinct, 

 bearing many setae ; secondary setae sparse or absent ex- 

 cept on prolegs. 

 g. Eversible mediodorsal glands present on abdominal seg- ,  '•/ 



ments 6 and 7. LIPARIDAE /'J^" ^-'"****^ 



gg. Eversible dorsal glands wanting, 

 h. Spiracles large, elliptical (Fig. 79). 

 i. Verruca kappa in about the same position on ab- 

 dominal segment 7 as on segments 6 and 8 (Figs. 

 33, 67, 68) ; when somewhat lower, mesothorax 

 bearing only one verruca above the Kappa group, 

 j. Mesothorax bearing only one verruca above Kappa , / 



group on each side. SYNTOMIDAE '^6U\^fM4AJ 



jj. Mesothorax bearing two verrucae above Kappa 



group on each side (Fig. 26). ARCTIIDAE 



ii. Verruca kappa much lower in position on segment 



7 than on segments 6 and 8, often absent or fused 



with verruca eta especially on segment 7 (Figs. 



65, 66). 



