The Origin of the Markings of Caterpillars. 195 



GROUP 3. In the species of this group the 

 eye-spots are repeated on all the segments. I 

 am acquainted with seven such Ch&rocampa larvae, 

 of which C. Bisecta, Horsfield, 14 shows some 

 affinity to the foregoing group, since the eye- 

 spots on segments 6 n have not yet attained 



ments. The green form appears to be transitional between 

 the present and the third group, as it possesses a distinct, but 

 rudimentary eye-spot on the third segment, besides the fully 

 developed ones on the fourth and fifth, and very conspicuous, 

 but gradually decreasing repetitions of rudimentary ocelli on 

 segments 6 10. To this group may be added Charocampa 

 Aristor, Boisd., the caterpillar of which is figured by Burmeister 

 (Lep. Re>. Arg., PL XV.. Fig. 4) in the characteristic attitude 

 of alarm, with the front segments retracted, and the ocelli on 

 the fourth segment prominently exposed. The subdorsal line 

 is present in this species. Burmeister also figures two of the 

 early stages (PI. XV., Fig. 7, A and B), and describes the com- 

 plete development of Philampelus Labruscce, another species 

 belonging to the subfamily Charocampintz. The earliest stage 

 (34 days old) is simple green, with no trace of any marking 

 except a black spot on each side of the fourth segment, the 

 position of the future ocelli. A curved horn is present both in 

 this stage and the following one, during which the caterpillar 

 is still green, but now has seven oblique red lateral stripes. The 

 caudal horn is shed at the second moult, after which the colour 

 becomes darker, the adult larva (figured by Madame Merian, 

 in her work on Surinam, pi. 34 and Sepp., pi. 32) being 

 mottled brown. In addition to the ocellus on the fourth seg- 

 ment, there is another slightly larger on the eleventh segment, 

 so that this species may perhaps be another transition to the 

 third group; but our knowledge is still too imperfect to 

 attempt to generalize with safety. R.M.] 



u Cat. Lep. Ins. East Ind. Comp., PL XIII. [Figured also 

 by Butler (Charocampa Silhetensis, Walker), loc. at. PI. XCII., 

 Fig. 8. R.M.] 



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