55 j 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 

 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. 



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. LIP ARID AE 

 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 



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). 



