Another common Indian Danaid (_D. limniace_), black, spotted with pale green, is imitated, though not very closely, by the female of one of the “white” group, _Nepheronia hippia_. Finn found that this insect was eaten freely by birds, and that the common jungle-babbler (_Crateropus canorus_) was deceived by the mimicry of the female. The very nauseous Indian swallow-tail (_Papilio aristolochiæ_) is closely imitated by another swallow-tail (_P. polites_), both having black wings marked with red and white; _P. aristolochiæ_, however, has a red abdomen. This difference was not noticed by two species of Drongo-shrikes (_Dicrurus ater_ and _Dissemurus paradiseus_), to which the butterflies were offered; but the Pekin robin (_Liothrix luteus_)—a very intelligent little bird—did not fail to pick out and eat the mimic, though it was deceived by the marvellously perfect imitation of _Danais chrysippus_, by the female of the _Hypolimnas_. Such resemblances can therefore be effective. The cases of mimicry usually quoted include very few among mammals, probably, as Beddard suggests, because the species of that class are relatively few. The insectivorous genus _Tupaia_ is supposed to mimic the squirrels, which it much resembles as regards form in all respects save the long muzzle; the idea being that squirrels are so active that carnivorous animals find it hopeless to pursue them. On the other hand, there is a squirrel (_Rhinosciurus tupaioides_) which is supposed to mimic the tupaias! It has a similar long muzzle, and the light shoulder-stripe which is a common marking in tupaias. But why the squirrel, one of the group imitated, should in turn become an imitator is not explained. The true interpretation of the resemblance is probably that both squirrels and tupaias are adapted to a life in trees. Like profession begets like appearance: the ground-living shrews much resemble mice, and the moles find representatives in mole-like rodents. Another case, however, wherein true mimicry may have come into play is that of the South American deer (_Cervus paludosus_) which singularly resembles in colouration the long-legged wolf or _Aguara-guazu_ (_Canis jubatus_). Both these species are chestnut in colour, with the front of the legs black, and the ears lined with white hair; both inhabit the same regions in South America. Müllerian Mimicry