212 Sludics in the Theory of Descent. 



was already of a dark, blackish-green ground- 

 colour 22 with a broad, greenish-white subdorsal 

 line sharply defined throughout its entire length, 

 and containing ring-spots of a sulphur-yellow with 

 an orange-red nucleus; the black "ground-area" 

 did not encroach upon the subdorsal line, but was 

 confined to two faint crescents situated above 

 and below the " mirror." Only the two foremost 

 " mirrors " (on the second and third segments) 

 were without nuclei. 



The remaining peculiarities of coloration are 

 shown in the figure. I may here only point out 

 the shagreening present on the sides and a 

 portion of the under surface. 



The specimen figured was 3.3 centimeters long; 

 a second example measured 2.8 centimeters in 

 length, and was essentially similar, but showed 

 that a considerable amount of variability must 

 prevail at this stage of development. It was pitchy 

 black, with a very indistinct subdorsal line and a 

 few ring-spots, the " mirrors " of which were 

 also sulphur-yellow, with the orange-red nucleus. 

 The shagreening was quite as strong as in the 

 first specimen, the dots being yellow instead of white. 

 It is specially to be observed, because of its im- 

 portant theoretical bearing, that in this larva the 

 ring-spots were absent on the three front segments, 

 and on the fourth only, a faint indication of one 

 could be perceived. In the caterpillar figured 

 * The green is considerably too light in Fig. 45. 



