SPHINGID.-E. 13 



gradually to reddish, and this colour becoming slowly in- 

 tensified from year to year, until in old specimens the influence 

 sometimes, though rarely, attacks the central band and changes 

 it also to dull red. Along with the paler portion of the fore 

 wings a similar gradual change takes place to some extent in 

 the lighter portions of the hind wings. But this change of 

 colour — chemical or othervyise — is not solely the effect of 

 fading in the dead insect; it occurs also in the living moth, 

 and even in some cases is the original colour in which the 

 specimen emerges from the pupa. Mr. Frohawk has even 

 reared a specimen having the central band dull red. Very 

 rarely a specimen occurs which is totally devoid of any trace 

 of the central fascia or spots, and in other instances, hardly 

 so rare, one fore wing is destitute, while the other has a 

 small spot or cloudy indications. From these forms every 

 possible grade of variation, to the complete band, exists. 

 * On the wing at the end of May and through June. No 

 second brood. 



Larva elongate, rounded, narrower in front; head large, 

 triangular, with the apex upwards ; skin not polished ; 

 twelfth segment with a long horn, curved backwards ; anal 

 flap with several raised points or incrustations. Back 

 brilliant apple green ; sides and belly paler green ; whole 

 surface covered with raised yellow dots ; seven oblique lateral 

 yellow stripes, sometimes edged above with violet or purplish, 

 the first commencing on the fourth segment, and the last, 

 and most conspicuous, ending at the base of the dorsal horn, 

 which is blue above, purplish or violet beneath, with the tip 

 yellowish. The incrustation or scutcheon on the anal flap 

 is orange, edged externally with yellow, and encloses a dark 

 purplish blotch. Spiracles yellowish edged with carmine ; 

 legs tipped with pink ; face edged with a yellow line. 



Or with the back dull dusky purple dotted with pale 

 emerald green ; sides and belly dull pale purplish flesh colour, 

 with seven pale green lateral lines, the first entirely on the 



