Zoological Illustrations Series II/Plate 136



In every natural group of the diurnal Lepidoptera which we have analysed, (and the number is somewhat considerable,) there is always one in which the posterior wings are more than usually tailed; and this seems to be such a prevalent form throughout the Vertebrata and the Annulosa, that we believe it is universal: in other words, that it is one of the PRIMARY TYPES of Nature. We have consequently termed it the natatorial, since it represents that order of birds, as the Swallow-tailed Papiliones typify the Swallows. That we should find this form in a group where the chief character is the roundness and the integrity of the wings, is certainly astonishing; but it shews that the laws of Nature are as simple, as they are universal. The absolute union of this sub-genus with Lycæna, with which we commenced the circle, is palpable to the meanest capacity. All the species we possess, are from Africa and India. As they represent the Argynninæ, we accordingly find them ornamented with silver spots. The species now figured, are probably male and female, and were received from Africa.

We have now given the natural types of an Entomological genus; the only one that has been attempted, since the demonstration of Phanæus and Scarabæus. These are but three genera, out of many thousands, which at present have any other foundation, strictly speaking, than mere opinion. But the great principles of variation are now discovered, and we must hope that those naturalists of a higher order, who join acknowledged talent to matured experience, will follow up the subject.