Figs. 37–44. Development of the markings of Deilephila Euphorbiæ.
Fig. 37. Stage I.; young caterpillar shortly after emergence. Natural length, 5 millim.
Fig. 38. Similar to the last, more strongly magnified. Natural length, 4 millim.
Fig. 39. Stage II.; larva immediately after first moult. The row of spots distinctly connected by a light stripe (residue of the subdorsal line). Natural length, 17 millim.
Fig. 40. Stage III.; after second moult; magnified drawing of the last five segments. Only one row of large white spots on a black ground (ring-spots); subdorsal 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 two 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.