375 
E.g. in the fullgrown caterpillar the contrast between thorax and 
abdomen is of the same nature and as strikingly pronounced as in 
that of convolvuli. The dorsal stripe is only marked by a thin but 
sharply drawn black line, extending all along the thorax, but on the 
abdomen only covering the anterior three segments. The light subdorsal 
and epistigmal lines on the contrary are well developed on the 
thoracal segments, the first runs up to the big ocellus-spot on the 
first abdominal ring, this. spot, as WuwisMANN’s investigations have 
proved, differentiating itself in the course of development of the 
caterpillar from the anterior part of the subdorsal line on this segment, 
while at the same time the posterior part obliterates. 
The second eye-spot is formed in the same way. In the specimen 
at my disposal this spot was much bigger and more purely circular 
at the left side of the body than at the right. On the latter side 
however the spot consisted of two parts, lying immediately behind 
each other, and so betrayed its real nature asa part of the subdorsal 
line still better than at the opposite side. 
On the next abduminal segment traces of the light subdorsal line 
ean still be detected, and likewise of dark spots immediately above 
it on the level of the first annulus. Above the stigmata of the 
abdomen dark diagonal striae run upward, bordered at their ventral 
side by light stripes: proving that the common motive of design of 
the Sphingid caterpillars is present also bere. These striae and stripes, 
though occupying the whole length of the segments, yet figuratively 
speaking seem to be drawn on a back-ground of light spots and 
dark siripes, which themselves are strictly bound to the division of 
the segments into annuli. 
Moreover a contrast exists between the dorsal and the ventral side. 
On the first we meet at every annulus with a row of small black 
stripes, between which the ground-colour is lighter and therefore 
makes the impression of clear spots separated by black lines. This 
part of the design shows a great similarity with the annuli-markings 
of the full-grown convolvuli-caterpillar. 
At the ventral side on the contrary each annulus carries a row 
of white lentiform knobs, constituting the basal cushions of short 
setae. On the level of the epistigmal area the knobs pass into the 
light spots, evidently tbe latter occupy the same place as the former, 
at least the knobs diminish in size and conspicuousness towards the 
dorsal side. This feature therefore confirms the assertion that the 
colour-pattern of the fullgrown convolvuli-caterpillar may be derived 
from the condition before the last eedysis, by supposing the knobs 
to fall ont and to become replaced by the light spots. It also deserves 
