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attention, that in ce/erio the knobs have maintained themselves at 
the ventral side of the caterpillar, in atropos on the contrary at 
the dorsal surface, while in ligustri they are totally absent, probably 
an effect of obliteration. 
These rows of knobs, standing regularly arranged along the annuli, 
probably represent the same feature as the chagrination of the larval 
skin, mentioned for many Sphingid-caterpillars by Weismann and 
Voss, these investigators however having paid no special attention 
to this feature. When studying the figures, which the latter author 
gives for the younger instars of the Smerinthus-caterpillars e.g. the 
yellowish-green variety of JS. ocellatus, (fig. 22, III stage and 23, 
III stage), we find distinct indications of these light spots arranged 
in a dorso-ventral row on the annuli. Judging from older tigures of 
Ceratoma amyntor and Pogocolon nessus, the rows of setiferous 
knobs here run regularly from the dorsal to the ventral side of all 
the segments, those of the thorax as well as those-of the abdomen. 
Now comparing the caterpillar of celerto with the body of the 
moth, the correspondence in design in many regards is still more 
striking than in the before-mentioned species of Sphingids. For on 
the dorsal side of the abdomen of the imago the markings consist 
of alternating light and dark longitudinal lines, and these lines are 
seen to be composed of a chain of coloured patches, which on every 
segment clearly show the division into annuli, just as on the body 
of the caterpillar. On the first and the last annulus of each segment 
the design is developed best: silvery-white spots in the dorsal median 
line and subdorsal stripes marking the anterior and the posterior 
border of the anterior abdominal segments. Along either side of the 
median line (which behind the mentioned white spot carries a series 
of black stripes), dark bands run in a longitudinal direction; these 
as well as the median stripe are prolonged over the thorax. To the 
lateral side of these three dark bands a silvery stripe is formed, the 
homologue of the subdorsal line, and over the root of the wing we 
again meet the light epipterygial stripe which runs on to the head 
above the eye, and shows a great similarity to the epistigmal stripe 
of the caterpillar. But on the abdominal segments we are likewise 
able to distinguish stigmal, hypostigmal, subventral and ventral 
longitudinal bands, and we also see that the epistigmal, the subdor- 
sal and the dorsal bands are characterized by the occurrence of 
silvery-white bushes of hairs. Using a magnifying glass for more 
minute observation, each of these stripes is seen to be again com- 
posed of lighter and darker bushes and groups of specks, the whole 
circumference from the dorsal to the ventral median line therefore 
