As only three specimens of Trimerotropis, Stal, have been reported from Canada, and as the writer has taken several others, of which three seem to be undescribed, the present paper may be of some value as a preliminary notice of the Canadian species of this genus.

The following table will serve to distinguish the species of Trimerotropis known to occur in Canada. It is artificial, but as the species enumerated are few, the table will perhaps be of greater service than would a more natural one. In the notes following the table the species are arranged according to MC Neill's recent. “Revision of the Orthopteran Genus Trimerotropis,” the new species being placed according to their nearest affinities.

SIR,–Permit me to correct a slight error into which Mr. King has fallen in regard to the locality where I found the scales of Eulecanium Lymani, as the tree was not, as stated, at Quebec, but at St. Hilare, a station on the line of the Grand Trunk Railway, about twenty-two miles east of Montreal. I shall be happy to send specimens of this scale to anyone interested in scale insects.

Most of the material upon which the following descriptions are based belongs to the National Museum, and the species are here described at the request of the curator, Dr. W. H. Ashmead.

Eutettix pannosa, n. sp.–Resembling saucia and scaber in general appearance, smaller, darker, and with longer vertex and more generally reticulate elytra. Length, ♀ 4.5 mm., ♂ 4 mm; width, ♀ 1.5mm., ♂ 1.25 mm.

Vertex right angled, apex blunt, three-fifths as long as its basal width, two thirds as long as the pronotum, half longr on middle than against eye, disc slightly sloping, flat, with the apex elevated. Face retreating, forming an acute angle with the vertex, front rather broad. Elytra rather short, comirressed at the apex, venation weak, irregniarly reticulate, the second cross nervure sometimes present.

In Dr. Dyar's “Preliminary Notes on the Larvæ of the Genus Arcta” (Jour. N.Y. Ent. Soc., March, 1900), some interesting remarks are made in reference to the larvæ of Arctia virgo, as to the stage in which the larvæ hibernate, and if they ever posses a dorsal stripe.

Through the kindness of the late Mr. T.G. Priddey, of Toronto, we received on the 10th April, 1901, three larvæ of A.virgo, collected by him on the 5th April. Writing under date of the 8th April to Dr. Fletcher, Mr. Priddey says: “I shall probably get more larvæ, but even now the bank under the grass where they hibernate is quite solid ice.” The three specimens only moulted once before maturity, viz., on the 26th April, 30th April, and 8th May, respectively; so these, at any rate, hibernated in the penultimate stage. Mr. Dwight Brainerd tells me that “ at Montreal, A. virgo generally hibernates in its second to las skin; that is, it sheds its skin twice in the spring before going into pupation.” He also states that he has found specimens in the fallin the penultimate stage. In the Annual Report of the Entomological Society of Ontario for 1869, on page 13, Dr. Fyles mentions that in the spring of 1891 he collected larvæ of this species at South Quebec, which moulted on the 4th May and again on the 20th May, the moths emerging on the 10th July.

In 1834 Dejean proposed the name Euchætes for a genus of Coleoptera, and it had thus been preoccupied for seven years when Harris used it in 1841 for the moth named by Drury, Bombyx Egle.

In 1858 it was used for a third time by Sclater for a genus of birds, and in 1876 Leconte described another genus of Coleoptera under this same much-used name.

As it is a well-known rule of nomenclature that a generic name can be used only once in the animal kingdom, all subsequent use of the term for other genera is erroneous and must cease.

It therefore becomes necessary to give other names, and I propose the name EUCHÆTIAS, from a kindred Greek word, for the genus erected by Harris. It is not necessary for me to define the genus, as it is well known, and this is merely a necessary change of name, the type, of course, being Egle, Drury.

In September, 1899, I published an account of a new cherry pest, which I called the cherry fruit-fly (Bulletin 172, Cornell Experiment Station). As stated on pp.31 and 32 of this bulletin, the identity of the adult insect insect not then been established, although the evidence strongly indicated that it was the fly known as Rhagoletis cingulata, Loew. I kept my breeding cages containing the hibernating puparia of the insect in the warm greenhouse or insectary all winter, and on March 9th, 1900, the first cherry fruit-fly emerged. It did not disappoint my expectxtions, for it demonstrated beyond further doubt that this new cherry-fruit pest is Rhagoletis cingulata, Loew. By May 31st nine more fo the files had emerged, and then cherries near the insectary were nearly half grown. The flies continued to emerge until July 11th in my cages, and on June 30th I received word from Geneva that they were abundant about the trees where the fruit was ripening. This correspondent caught quite a number of the files with sticky fly-paper hung on a shingle in a tree; he said they seemed to be attracted to any bright-coloured thing like a new straw that.