352 BRITISH LEPIDOPTERA. 



developed to the extent shown in the figure. The spiracles were like those of the 

 second larva, but the patches were more distinct. The distinction between patch 

 and spiracle could not be indicated on a drawing of the size of the figure. The 

 smoky patch was very faint in the case of the prothoracic spiracle, but it tended to 

 pass backwards, so as nearly to fuse with the patch between the second and third 

 thoracic segments. The median dorsal line was present, as in all these larvae. The 

 ground colour was not quite such a whitish blue-green as in the last individual. 

 The extremely Smerinthine appearance of these three larvae is well shown in fig. io. 



4. The fourth larva was less decidedly bluish -green, and tended somewhat 

 towards an intermediate variety. The horn was very black and the transparent 

 zone was only slightly marked. The red spots were rather larger than in the 

 larva last described, but they were otherwise similar. There was only a slight 

 dark shade upon the anal flap, but below it there was much of the dark colour 

 (more than in any of the three larvae hitherto described), and a dark shade 

 appeared, for the first time, at a still lower level, upon the last clasper. The 

 patches around the spiracles were larger and darker, and the three lightest spiracles 

 (1st and the last two) were also darker. The claspers were blacker, and a dark 

 shade spread upwards from the semilunar mark. The dark spiracular line, 

 extending backwards from the 1st spiracle, was more marked than in fig. 10. 

 The thoracic legs were blacker and less red. The lateral marks on the head 

 were very black, and there were rather faint lines in front of, and parallel 

 with, the former. These marks were more distinctly shown in the other darker 

 larvae (see figs, n, 12, 13, and 15). The subdorsal line, oblique stripes, and their 

 borders were very much as in the 3rd larva, except that there was a distinct, 

 although faint, dark cloud upon the borders, below the red spots ; this character 

 is plainly shown in another larva represented in fig. 11. 



5. The fifth larva was, like the fourth, a long way on the bluish side of an 

 intermediate variety. The horn was very black, the light zone being small, but bright 

 yellow in colour. The spiracles were black, except the first and last, which were dark 

 brown ; the patches surrounding them all were large, but not very dark. The red 

 spots were large, becoming somewhat larger anteriorly. The borders to the stripes, 

 above and behind the spots, were very faintly reddish, especially in the posterior of 

 the two segments crossed by each border, and also in the anterior part of the anterior 

 segment. [This arrangement is shown in a far more pronounced form in fig. 11.] 

 This character was less distinct in the last two stripes. The other parts of the 

 borders were distinct and of a dark green colour. The spiracular line upon the 

 thoracic segments, and the mark between the 2nd and 3rd of these, were distinct, 

 although not very black. The broad lateral line on the head was dark and distinct, 

 and traces of the anterior line were also present. The subdorsal line was very 

 indistinct except anteriorly ; the stripes were fairly distinct, especially the last. 

 The shade on the anal flap was faint and of small extent, but large and dark 

 below it. The thoracic legs were very dark above and red below, like those of the 

 larva last described. There was a faint subspiracular cloud, corresponding with 

 that which was more distinct in other larvae (figs. 11, 12, 13). There was a tendency 

 in this and all the other larvae towards the fusion of the posterior parts of the dark 

 borders with the dark dorsal line. 



6. The sixth larva was very similar to the last, only rather darker through- 

 out. The traces of red borders to the stripes were somewhat more distinct. The 

 transparent zone was very small, although bright yellow. 



7. The seventh larva was a distinct yellowish-green variety. The spots were 

 still reddish, although darker in colour than in previous larvae; the dark parts of the 

 borders were also of a dark reddish colour. The fusion between the dorsal line and 

 posterior parts of the borders, had now caused the appearance of a broad dark green 

 dorsal band. The stripes were distinct and of a yellowish-white colour. The zone 

 on the horn was slight and dim. The spiracles were all black except the last, which 

 was nearly so. The last red spot was small and indistinct, and the last but one was 

 also smaller than the others. The anterior line on the head was distinct, as well as 

 the lateral band. There was no trace of an anterior extension of the upper part of 

 the dark borders along the upper margin of the subdorsal line, as in other larvae to 

 be described below (see figs. II, 12, 13). In all the points not specially alluded to 

 this larva was about as dark as the one last described. 



8. The eighth larva was also distinctly yellowish-green, and its appearance 

 is indicated in fig. 12 (x 3). It was much darker than the last, and the spots were 

 black and not red. The amount and distribution of the dark markings is 

 sufficiently indicated in the figure. Although so different from the larvae hitherto 

 described, some of the varieties of the next division of larvae, of which one is 



