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spots determines the impression they call forth, either of a light or 
of a dark party of the caterpillar-skin. While light spots on the same 
level on successive annuli arrange themselves to light longitudinal 
stripes, small spots on the contrary appear as light specks in a dark 
band. Here and there these specks totally vanish, a larger black 
spot being the result. So the prothorax shows no other ornamen- 
tation than a pair of big epistigmal dark blotches on its flanks, 
passing in a caudal direction into the dark longitudinal strokes, which 
on the abdominal segments periodically become transected by the 
oblique light stripes. On meso- and metathorax a light brownish-yellow 
median dorsal stripe is present, flanked at some distance by light 
subdorsal stripes, separated from the firstnamed by dark bands, which 
in the anterior part of eacb segment bear the character of dark spots. 
Beneath the jline of the stigmata runs a very broad light streak, 
over the roots of the legs two dark longitudinal lines are seen. 
All these markings are found again on the abdominal segments, 
but in a modified, more complicated condition. The dorsal stripe 
passes uninterruptedly from thorax to abdomen in the form of 
a light band, slightly contracting in the middle of each segment, 
while at its anterior margin a pair of yellowish-white spots, sepa- 
rated by a small dark stripe, contribute to render the first annulus of 
each abdominal segment more conspicuous. But in the first place this 
effect is reached by the two sharply drawn brownish-black spots at the 
lateral side of the just-mentioned light dorsal maculae, and by the clear 
white specks, which in their turn flank the outer side of these maculae. 
This series of alternately light and dark spots on the first annulus 
evidently only consists of nothing more than highly conspicuous 
links in the prolongation of the above mentioned three light and two 
dark lines that run over the dorsal side of the thoracal segment. 
It is therefore in harmony with this fact, when we remark that 
from each of the black blocks a dark streak runs on in a caudal 
direction. These streaks converge towards the centre of the segment, 
in harmony with the median light dorsal streak, whieh narrows in 
the middle of each abdominal ring, while towards the back end of 
the segment the streaks again diverge. Consequently the dorsal stria 
broadens towards the latter margin and so forms a triangular area, 
which somehow assumes the character of an independent spot; this 
aspect being heightened by the repetition, in the centre of the segment, 
of the small black stripe in the middle line on the first annulus. 
Looking from the lateral side, the similarity between thoracal 
and abdominal designs likewise strikes us, but at the same time we 
remark the deviation of the latter from the original condition, in 
