of certain lepidopterous lance and pupa. 69 



stage of the ontogeny). The small 8th oblique stripe is shown. 

 The ground colour is darker in front of the oblique white stripes. 



Fig. 4. — Natui'al size. The head and anterior segments of the 

 same larva as Fig. 3, seen from the left side in the Sphinx attitude 

 of repose. The spiracle on the 2nd segment is nearly hidden 

 among the folds due to the attitude. The anterior part of the sub- 

 dorsal is bent down into approximate parallelism with the oblique 

 line system. It is seen that the latter system would have been 

 marred if it had been repeated anteriorly with the same relation to 

 the segments that it possesses posteriorly. The slight 8th stripe 

 deepens the impression that the subdorsal belongs to the oblique 

 system. The effect is less complete in this figure than in the 

 normal larva, because the subdorsal does not disappear posteriorly 

 in this particixlar larva. 



Fig. 5. — Adult (and probably enlarged) larva of Endromis 

 versicolor, seen from the right side, copied from the plate on 

 page 203 of Newman's ' British Moths.' The horizontal spiracular 

 or subspiracular Hne seems to be normal on segments 2 — 6. Pos- 

 teriorly to this point it becomes oblique on each segment, forming 

 a line with the (true) oblique stripe of the segment in front. The 

 older marking is thus completely subordinated to the more recent 

 system, except where the latter is absent (segments 2 and 3), or but 

 little developed (segments 4 and 5). The older form of marking is 

 easily recognised, even in the segments in which it has been modi- 

 fied, by a single row of longitudinally arranged dots always present 

 upon it, but absent from the true oblique system. 



Fig. 6.— Natural size. Some segments of a nearly full-grown 

 larva of S2Mnx ligustri, seen from above. The slightly-marked 

 dorsal line is due to the dorsal vessel. Each oblique white stripe 

 passes into a yellowish gi-een line posteriorly (as it reaches the 

 limits of the segment in which its chief course Hes). Each pm-ple 

 border similarly passes into a dark green hne. The short yellowish 

 green and dark green lines much resemble the colouring of the 

 oblique system in Smerinthus (yellow in S. 2^02ndi, &c.), and 

 suggest that this was the primitive marking. 



Fig. 7. — Natural size. The posterior segments of a larva of 

 S. ligustri fairly advanced in the last stage, seen from the right 

 side. (The larva was the same as that shown in Fig. 6, but this 

 figure [7] was made- previously). The same relation of the pure 

 white and purple stripes to yellowish green and dark green lines is 

 seen from the side. Each white stripe becomes scattered and 

 shagreen-like anteriorly and inferiorly, The j)urple border becomes 

 darker anteriorly and inferiorly, and is continued on the posterior 

 side of the white stripe (inferiorly) as a dark blotch. On the 12th 

 segment there is a slight indication of a white stripe, and a con- 

 siderable, though interrupted, purple line. 



