_Insects._--The butterflies of this sub-region exhibit the same mixture of tropical and temperate forms as the birds. Most of the common European genera are represented, and there are species of _Parnassius_ in Japan and the Amoor. _Isodema_, a peculiar genus of Nymphalidæ is found near Ningpo, just within our limits; and _Sericinus_, one of the most beautiful genera of Papilionidæ is peculiar to North China, where four species occur, thus balancing the _Thais_ and _Doritis_ of Europe. The genus _Zephyrus_ (Lycænidæ) is well represented by six species in Japan and the Amoor, against two in Europe. _Papilio paris_ and _P. bianor_, magnificent insects of wholly tropical appearance, abound near Pekin, and allied forms inhabit Japan and the Amoor, as well as _P. demetrius_ and _P. alcinous_ belonging to the "Protenor" group of the Himalayas. Other tropical genera occurring in Japan, the Amoor, or North China are, _Debis_, _Neope_, _Mycalesis_, _Ypthimia_ (Satyridæ); _Thaumantis_ (Morphidæ), at Shanghae; _Euripus_, _Neptis_, _Athyma_ (Nymphalidæ); _Terias_ (Pieridæ); and the above-mentioned Papilionidæ. {228}_Coleoptera._--The beetles of Japan decidedly exhibit a mixture of tropical forms with others truly Palæarctic, and it has been with some naturalists a matter of doubt whether the southern and best known portion of the islands should not be joined to the Oriental region. An important addition to our knowledge of the insects of this country has recently been made by Mr. George Lewis, and a portion of his collections have been described by various entomologists in the _Transactions of the Entomological Society of London_. As the question is one of considerable interest we shall give a summary of the results fairly deducible from what is now known of the entomology of Japan; and it must be remembered that almost all our collections come from the southern districts, in what is almost a sub-tropical climate; so that if we find a considerable proportion of Palæarctic forms, we may be pretty sure that the preponderance will be much greater a little further north.