Another species (Sphinx tersa) is represented feeding on a
plant with small red flowers situated in the axils of the leaves; and
the larva has a row of seven red spots, unequal in size, and
corresponding very closely with the colour and size of the flowers. Two
other figures of sphinx larvae are very curious. That of Sphinx
pampinatrix feeds on a wild vine (Vitis indivisa), having green
tendrils, and in this species the curved horn on the tail is green, and
closely imitates in its curve the tip of the tendril. But in another
species (Sphinx cranta), which feeds on the fox-grape (Vitis vulpina),
the horn is very long and red, corresponding with the long red-tipped
tendrils of the plant. Both these larvae are green with oblique stripes,
to harmonise with the veined leaves of the vines; but a figure is also
given of the last-named species after it has done feeding, when it is of
a decided brown colour and has entirely lost its horn. This is because
it then descends to the ground to bury itself, and the green colour and
red horn would be conspicuous and dangerous; it therefore loses both at
the last moult.
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