Explanation of the Plates. '551 



Fig. 48. Similar to the last. Yellow var. without any 

 trace of shagreen ing. 



Fig. 49. Deilephila Vespertilio. Three stages in the 

 life of the species, representing three phyletic stages of 

 the genus. A, life-stage III.=phyletic stage 3 tsubdor- 

 sal with open ring-spots); B, life-stage I V. = phyletic 

 stage 4 (subdorsal with closed ring-spots) ; C, life-stage 

 V. = phyletic stage $ (subdorsal vanished, only one row 

 of ring-spots). 



Fig. 50. Deilephila Zygophylli, from S. Russia ; stage 

 V. From a blown specimen in Staudinger's collection. 

 In this specimen the ring-spots are difficult to distin- 

 guish on account of the extremely dark ground-colour ; 

 they are nevertheless present, and would probably be 

 more distinct in the living insect. A, open ring-spot 

 from another specimen of this species in the same col- 

 lection. 



Fig. 5 1 . Deilephila Nicaa, from South France ; Stage 

 V. Copied from Duponchel. 



Fig. 52. Sphinx Convolvuli; Stage V., segments 10 8. 

 Brown variety, with distinct white spots at the points of 

 intercrossing of the vanished subdorsal with the oblique 

 stripes. 



Fig. 53. Aticeyrx Pinastri; A and B, larvae immediately 

 after hatching. Natural length, 6 millim. 



Fig. 54. Same species ; Stage II. Subdorsal, supra - 

 and infra-spiracular lines developed. Natural length, 

 15 millim. 



Fig- 55- Smerinthus Fofnili ; Stage I. Immediately 

 after hatching ; free from all marking. Length, 6 

 millim. 



Fig. 56. Same species at the end of first stage ; lateral 

 aspect. Length, 1.3 centim. 



Fig. 57. Same species; Stage II. Subdorsal indis- 

 tinct ; the first and last oblique stripes more pronounced 

 than the others. Length, 1.4 centim. 



