PLATE XII. 
Fig. 1. Pterygia Satan as, page 71. Imago variegated with white pilose matter. 
Fig. 1 a. The front aspect, showing the leaf-like frons and the serrated supra- 
humerals. 
Fig. 2. Pterygia rubicunda, page 72. Imago. 
Fig. 3. Pterygia uropigii , page 72. Imago, with its characteristic caudal process. 
Fig. 3 a. The supra-liumeral process seen at different angles, and therefore apparently 
non-symmetrical. Also the frons and ocelli. 
Fig. 4. Pterygia spinida, page 72. Imago variegated with white patches. 
Fig. 4 a. Head, frons, and fore-femora. 
Fig. 5. Pterygia Jiorrifica , page 73. Imago with clubbed and spinose supra- 
humerals. 
Fig. 6. Pterygia concolor , page 73. Imago with its overhanging pronotum. 
Fig. 6«. Tegmen with ochreous patches. 
Fig. 7. Pterygia now, page 73. Imago, probably of the female. 
Fig. la. Front view of the same insect with its mitre-like supra-humerals. 
Fig. 8. Pterygia nox, either a variety, or the male of that species. The white marking 
of the figure represents only the glance from the shining jet-black surface. 
Fig. 8a. Front view of the same insect. 
