55O Explanation of the Plates. 



drawing of the last five segments. Only one row of 

 large white spots on a black ground (ring-spots) ; sub- 

 dorsal completely vanished ; the shagreen-dots formerly 

 absent now appear in vertical rows interrupted only by 

 the ring-spots. Below the latter are some enlarged 

 shagreen-dots which subsequently become the second 

 ring-spots. Natural length of the entire caterpillar, 

 21 millim. 



Fig. 41. Stage IV. ; the same larva after the third 

 moult. Transformation of the ground-colour from 

 green to black, owing to the spread of the black 

 patches proceeding from the ring-spots in Fig. 40 in 

 such a manner as to leave between them only a narrow 

 green triangle. The shagreen dots below the ring- 

 spots have increased in size, but have not yet coalesced. 



Fig. 42. Stage III. ; larva, same age as Fig. 40, but 

 with tivo rows of ring-spots. Natural length of the 

 whole caterpillar, 32 millim. 



Fig. 43. Stage V. ; larva from Kaiserstuhl. Variety 

 with only one row of ring-spots, and with red nuclei in 

 the mirror-spots. Natural length, 5 centim. 



Fig. 44. Stage V. ; larva from Kaiserstuhl (like the 

 three preceding). The green triangles on the posterior 

 edges of the segments in Fig. 42 have become changed 

 into red. Natural length, 7.5 centim. 



Fig. 45. Deilephila Galii ; Stage IV. Subdorsal with 

 open ring-spots. Natural length, 3.4 centim. 



Fig. 46. D. Galii ; adult larva ; Stage V. Brown 

 variety with feeble shagreening ; subdorsal completely 

 vanished. Natural length, 6 centim. 



PLATE VI. 



Fig. 47. The same species at the same stage.. Black 

 variety strongly shagreened ; similar to Deil. Eu- 

 p/iorbia. 



