PLATE XVI. 
(Natural sizes indicated in hair-line.) 
Fig. 1. Larva of Si/stai-hus oreaa, from the side ; 1 b, head from side, filill further en- 
larged ; 1 c, same, from front ; 1 d, left maxilla ; 1 e, left mandible ; 1/, meso- 
thoraeic spiracle ; 1 g, pre-anal spiracle. 
2. Pupa of Syxtachiis orcas, ventral view ; 2 a, same, side view : 2 dorsal part 
of anal end; 2c, prothora-cic spiracle; 2d, form of dorsal horny plates and 
spines ou the abdomen. 
3. Syslccchus oreas, 9 ; 3 a, head of same from side; 3 b, antenna of same from 
above ; 3 c, antenna, of same from side ; 3 d, mouth parts separated. 
4. Larva of Triodites mvs as it appears when contracted prior to pupation ; 4 a, 
head from side ; 4 b, left maxilla ; 4 e, left mandible. 
5. Pupa of Triodites mus, ventral view; 5 a, same, side view; 5 6, dorsal view of 
anal parts ; 5 c, form of dorsal plates and spines on abdomen. 
6. Triodites mus, 9 ; 6 a, her head, front view ; 6 b, her right antenna from above ; 
6 c, right antenna from side. 
7. Triodites mus, $ ; 7 a, his head, front view. 
