SMERINTHUS POPTJLI. 21 



stripes were already visible, also a yellowish- subdorsal 

 stripe, and spots on the back of the thoracic segments ; 

 the skin likewise assumed its rough character; they 

 were already eating pieces of the entire substance of 

 the poplar leaves. 



On the 11th of July most of them had moulted the 

 first time and were half an inch in length, and their 

 skin was now rough with innumerable raised points ; 

 the whitish, slanting side stripes were most conspicuous 

 on the fifth and tenth segments, that on the fifth 

 extending to the end of the dorsal part of the sixth 

 segment, and that on the tenth reaching to the base 

 of the horn on the twelfth segment ; these two were 

 stouter stripes than the rest which were but thin lines. 



On the 14th of July most of them had moulted the 

 second time, and their increase in size and more bluish- 

 green tint was remarkable ; in a few hours they were 

 three-quarters of an inch in length. On the thoracic 

 segments were thin subdorsal and spiracular lines of 

 whitish points, and similar spots were on the back of 

 the second to fifth segments and along the front of the 

 second segment, where they formed a margin ; on the 

 head also a line of white spots was to be seen down 

 the side of each lobe from the conical crown ; indeed, 

 one may say that all the segments were roughened or 

 shagreened with fine whitish points. 



On the 19th and 20th of July some moulted a third 

 time, others a few days later — the shagreened rough- 

 ness, the increased stoutness and the fuller and yel- 

 lower-green colour were at once very marked; they 

 now grew very rapidly and they moulted the fourth 

 time on the 27th, 28th, and 29th of July, some were 

 then marked with crimson spots one on each segment 

 along the subdorsal region, others had these spots 

 only on the end of the eighth, ninth, tenth, eleventh 

 and twelfth segments, those on the eighth and twelfth 

 being larger than the rest ; the narrow oval spiracles 

 were whitish edged with crimson, and just in front of 

 each spiracle was a narrow oblong crimson spot and 



