1 94 Studies in the Theory of Descent. 



to those in Elpenor and Porcellus. The tran- 

 sition to the third group is through another un- 

 named species from Mozambique, 12 in which 

 rather large eye-spots have become developed 

 on the fourth and fifth segments and these 

 are followed by a subdorsal line, which only 

 appears distinctly at certain places. On this 

 broken subdorsal line, and not completely sepa- 

 rated from it, there are small, roundish eye- 

 spots, situated near the front edge of each seg- 

 ment ; these being, therefore, a somewhat more 

 perfect repetition of the front eye-spots. 



13 



12 Ibid. 



13 [The following species figured by Butler (loc. dt. Pis. XC. 

 and XCI.) appear to belong to the second group Chceroeampa 

 Japonica, Boisd., which is figured in two forms, one brown, and 

 the other green. The former has two distinct ocelli on the 

 fourth and fifth segments, and a distinct rudiment on the sixth, 

 whilst the subdorsal line extends from the second eye-spot to 

 the caudal horn, and beneath this line the oblique lateral 

 stripes stand out conspicuously in dark brown on a lighter 

 ground. The ocelli are equally well developed on the fourth 

 and fifth segments in the green variety, the subdorsal line 

 commencing on the sixth segment, and extending to the caudal 

 horn ; there is no trace of a third eye-spot, nor are there any 

 oblique lateral stripes ; the insect is almost the exact counter- 

 part of C. Elpenor in its fourth stage. (See Fig. 21, PI. IV.) 

 Pergesa Mongoliana, Butl., is brown, without a trace of the 

 subdorsal line except on the three front segments, and with 

 only one large eye-spot on the fourth segment. Charocampa 

 Lewisii, Butl., from Japan, is likewise figured in two forms. 

 The brown variety has the subdorsal line on the three front 

 segments only, distinct ocelli on the fourth and fifth segments, 

 and gradually diminishing rudiments on the remaining seg- 



