EXPLANATION OF PLATE IV. 
Illustrating Mr. G, C. Griffiths’s paper “On the Frenulum of the 
Lepidoptera.” 
Fic, 1. Frenulum of Protoparce convolvuli, ¢. 
‘ Sphinx ligustri, 9. 
. Spinulee of Protoparce cingulata, Q . 
. Spinulee of Smerinthus populi, 9°. 
2 
3 
4. Abortive spina of Smerinthus populi, 3. 
5 
6. Spina of Protoparce cingulata, g. 
7 
. Frenulum of Composia olympia, ?. 
8 5 Arctia sp., 3 (Florida). 
9. 53 Callimorphia virgo, 9. 
10. a Zygena ephialtes, 2. 
11 + Drepana unguicula, g. 
12. + Tanagra chexrophyllata, 2. 
13: <5 Castnia licus, &. 
14. a Euschemon rafflesix, &. 
15. Spinulee of Sesia tipuliformis, ° . 
16. Frenulum of Cataclysta lemnalis, ¢. 
m = median nervure of forewing ; c = costa of hindwing. 
