This specimen is the rare English Black-veined White butterfly. It has
undoubtedly been netted in Teneriffe, though it has not been personally
observed by the author. In flight its similarity to other white
specimens is so great that it may often be passed unnoticed. It is said
to be local and uncertain in appearance, being seen chiefly during the
summer months about the fields and gardens. The wings are entirely of a
white cream colour, and are alike on both sides, the veins being black,
and the fore-wings having some dusky spots on them. The caterpillar is
black, thickly sprinkled with whitish hairs, and with a reddish yellow
stripe running along each side. It feeds on various fruit trees, and is
believed to be very destructive.