This beautiful moth was discovered by professor S. I. Smith, at Norway, Maine, and described by him in the proceedings of the Boston Society of Natural History, Vol. IX., March 1865. It is nearly allied to the well known Samia Cecropia, but differs therefrom in being slightly smaller, and in the colouration and markings, as well as in the form of the cocoon and appearance of the larva. It may, therefore, be regarded as a well established species. I have been so fortunate as to obtain a specimen at Quebec, and can therefore add this moth to our list of Canadian Bombycidæ

Palpi white : face opalescent or silvery, according to the light : antennæ maroon-brown, silvery towards the apex: tuft maroon-brown : thorax of a shining metallic lustre, in some lights opalescent : a streak of the same hue crosses the extreme base of the wings, is continued for a short distance along the dorsal margin, and thence curves obliquely across the wing again to the costal margin, enclosing a maroon-brown patch upon the costa, and being narrowly margined behind with dark maroon, beyond which the wing is bright golden to the apex.

The larva of this beautiful geometric moth is dark brown, and feeds on beech. The specimens, from which the subjoined description was made, were taken on the 10th of September, by beating the branches of some beech trees over an umbrella.

Length one inch, body cylindrical.

Head medium sized, bilobed, dark brown, with two bluish-white lines in front; mandibles paler.

Body above, dark brown, with a row of dull white dots on each side, one or two on each segment, most prominent from fifth to eighth segments inclusive, less distinct towards each extremity.

While inspecting, during the past summer, the fruit orchards of a friend residing in this neighbourhood, my attention was attracted by the peculiar appearance of the leaves of a young plum tree. At the first glance, I thought it might be affected by aphides, but, on closer examination, I found unmistakable evidence of the work of some leaf-cutting bee, in the circular holes in many of the leaves, and on opening one of the coils of leaves, of which there were four or five, I discovered the curiorts chambers of the bee, each containing a half-grown grub, comfortably ensconced, with its modicum of food.

Genus Dichelonycha Harris.–Labrum transverse, lanceolate, scarcely emarginate. Mandibles short, trigonal, incurved, toothless, acute : molary space transverse, furrowed. Maxillæ minute, linear, bidentate, with short teeth. Labium subquadrangular, not distinct from the mentum. Palpi maxillary four-jointed ; first joint very minute ; second longer than the third, obconical; third trianguler; last joint as long as the three others together, very large, subsecuriforrn. Palpi labial three-jointed; joints short, subfiliform ; last truncated.