Fig. 22. Stage V.; after fourth moult. A feeble indication of an eye-spot can be seen on the third segment besides those on the fourth and fifth. Ocelli absent on segments 6-10. Fig. 23. Stage VI.; after fifth moult. The subdorsal line is feebly present on segments 6-10, and very distinctly on segments 11 and 1-3. Ocelli repeated as irregular black spots above and below the subdorsal line on segments 6-11; a small light spot near the posterior border of segments 5-10 (dorsal spots) and higher than the subdorsal line. Larva adult. Figs. 24-28. Development of the markings of _Chærocampa Porcellus_. Fig. 24. Stage I.; immediately after emergence from the egg. Length, 3.5 millim. Fig. 25. Stage II.; after first moult. Length, 10 millim. Fig. 26. Stage III.; after second moult. Length, 2.6 centim. Fig. 27. Eye-spots at this last stage; subdorsal much faded, especially on segment 4. Position the same as in last Fig.; magnified. Fig. 28. Stage IV.; after third moult; corresponds exactly with Stage VI. of _C. Elpenor_. Dorsal view, with front segments partly retracted (attitude of alarm). Ocelli on segment 5 less developed than in _Elpenor_; repetitions of ocelli as diffused black spots on all the following segments to the 11th; two light spots on each segment from the 5th to the 11th, exactly as in _Elpenor_; subdorsal line visible only on segments 1-3. Length, 4.3 centim. Fig. 29. _Chærocampa Syriaca_. From a blown specimen in Lederer’s collection, now in the possession of Dr. Staudinger. Length, 5.3 centim. Fig. 30. First rudiments of the eye-spots of _Chærocampa Elpenor_, Stage II. (corresponding also with Fig. 19 in position, the head of the caterpillar being to the left). Subdorsal line slightly curved on segments 4 and 5. Fig. 31. Eye-spots at Stage III. of the larva Fig. 20 somewhat further developed (larva immediately before third moult). Position as in Fig. 20. Fig. 32. Eye-spots at Stage IV. corresponding to Fig. 21, A being the eye-spot of the fourth and B that of the fifth segment. Fig. 33. Eye-spot at Stage V. of the larva of _C. Elpenor_; fourth segment. Figs. 30-33 are free-hand drawings from magnified specimens. Fig. 34. _Darapsa Chærilus_ from N. America. Adult larva with front segments retracted. Copied from Abbot and Smith. Fig. 35. _Chærocampa Tersa_, from N. America. Adult larva copied from Abbot and Smith. PLATE V. Fig. 36. Sixth segment of adult _Papilio_-larvæ; A, _P. Hospiton_, Corsica; B, _P. Alexanor_, South France; C, _P. Machaon_, Germany; D, _P. Zolicaon_, California. 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.