GROUP 2.--This group contains numerous species which, like our native _C. Elpenor_ and _Porcellus_, show eye-spots on the fourth and fifth segments, whilst these markings are absent, or at most only present in traces, on the remainder. To this section there belong, besides the two species mentioned, five others, viz. in Europe, _C. Celerio_ and _Alecto_ (not certainly known?);[78] in India, _C. Nessus_, Drury, and _Lucasii_, Boisduval;[79] and an unnamed species from Port Natal.
In the species belonging to this group the subdorsal line may be more or less retained. Thus, _C. Celerio_, according to Hübner’s figure, has a broad yellow line extending from the horn to the sixth segment, whilst it is completely absent on the three front segments. In the unnamed species from Port Natal[80] the subdorsal line extends to the front edge of the fifth segment, and on the fourth segment only is there a perfect eye-spot, whilst on the succeeding segments traces of such markings can be recognized as dark spots similar to those in _Elpenor_ and _Porcellus_. The transition to the third group is through another unnamed species from Mozambique,[81] 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 separated from it, there are small, roundish eye-spots, situated near the front edge of each segment; these being, therefore, a somewhat more perfect repetition of the front eye-spots.[82]
GROUP 3.--In the species of this group the eye-spots are repeated on all the segments. I am acquainted with seven such _Chærocampa_ larvæ, of which _C. Bisecta_, Horsfield,[83] shows some affinity to the foregoing group, since the eye-spots on segments 6-11 have not yet attained full perfection. In _C. Odenlandiæ_, Fabr.,[84] and in _C. Alecto_ from India,[85] the eye-spots appear to be perfectly alike on all the segments; whilst in _C. Acteus_, Cram.,[86] and in the North American _C. Tersa_[87] (Pl. IV., Fig. 35) they are smaller on the other segments than on the fourth; and in _C. Celerio_, Linn., from India,[88] the size of the spots diminishes from the head to the tail.