Long, ·3o-·33 inch. Body elongated, glabrous, sanguineous, pilose. Head, disk of prothorax, and under surface black; head rhomboidal, middle wider than thorax, thence gradually constricted into a narrow rufous neck; eyes large and prominent; mouth parts, three basal joints, antennæ and legs rufous; eighth and ninth joints of antennae white, remaining joints black; prothorax elongate, cylindrical, piceous; humeral base and apex rufous, widest just behind middle, when viewed vertically two fine long yellowish erect hairs will be observed to arise laterally just before the middle, much longer than on elytra.

Since it is conceded that the law of priority is invariable in its application to zoological nomenclature, it remains for us to apply it to the determination of our Butterflies. That some inconveniences may arise from the corection of errors, does not militate against our desire to be right. The question is, are Mr. Scudder's genera well founded, or, are his names entitled to precedence, not is it convenient for us to use them. without as yet entering an extended discussion upon the structural characters of our Butterflies, we will briefly notice Mr. Scudder's genera.

It was in April of 1872, while at Plymouth, Mass., with a party of friends in search of the Mayflower Epigæa repens, that I was so fortunate as to capture a specimen of the larva of this insect. It was quite by accident that it came to my hands. A friend and myself were lounging by the roadside, for want of better employment thrusting our fingers into the light sand, when with a jerk and exclamation my friend withdrew his hand to find this larva clinging with a most determined nip to a finger; it immediately dropped to the ground, however, and so quickly buried itself backward as to almost escape us, but a moment's lively digging revealed it again, and I secured it in a pill box.

The characters of this genus are given at length under the name of Tenthredoides (Proc. Ent. Soc. Phil., iv., p, 29o), which airpears to be synonymous. It may be easily recognized by the short robust body, rather lalge transverse head, stout legs, broad ampie wings (which are, gencrally fuliginous). and especially by the form of the marginal cell, which is rather suddenly constricted (or somewhat reclivate) at tip of second sub-marginal cell, and thence narrowed to the apex, which is somewhat incurved, and reaches the extreme apex of the wing; this, as well as the second and third submarginal cells, are indistinctly defined, the nervures being sub-obsolete.

The publication of Mr. Scudder's Revision has caused much dismay among amateurs, on account of the numerous specific changes and minute generic sub-divisions which it proposes.

To students of Lepidoptera the novel, and in many cases, original views advanced afford a fertile field for discussion. Mr. scudder has attempted to study the order by the same methods, and to correct its tangled specific nomenclature by the same principles which govern a1l other departments of Zoology.

If the rule holds good absolutely that the same generic name should not be used in Entomologya and Botany, then Gracillaria must be dropped in one or the other. I do not know which has priority, but a name of a genus so old and well known as the Gracillaria of Micro-Lepidopterists ought scarcely to give place to an obscure genus of Cryptogamia.

There are but few of our readers who are not familiar with the caterpillar of the Isabella Tiger Moth, one of our commonest “woolly bears,” and found, we believe, in almost every part of canada and the Northern United States. This larva, in common with many other members of the family (arctidæ) to which it belongs, hybernates during the winter. It acquires nearly full growth in the autumn, and then, having selected a cosy sheltered spot under bark, 1og, rail, stone or board in which to hide, it coils itself up there into a sort of ball and sleeps through the long and dreary winter, and about the time when the birds come back and the warm days of spring begin, this bristly creature rouses itself to begin rife anew.

Before leaving the Canadian Chalcidiæ, in hope of returning to them when many more genera are discovered in Canada, I will mention Megastigmus, which very probably occurs there; it is a genus of Torymidæ, and, in some respects, connects that family with the Eurytomidæ, and is next to the latter in the interest with which it may be regarded in case there is a foundation for the report lately published concerning the seed-eating habits of the species which represent it in California.

Last season, while in the Catskill Mountains, I made some experiments in sugaring for moths, which may be interesting to collectors.

The sugaring mixture employed was “molasses sugar” and water, in the proportion of three or four pounds to the gallon; I could not perceive that other additions, such as alcohol or preserved fruit, &c., were of any advantage.