The common callipers ordinarily sold for measuring insects have always seemed to me too coarse for fine work. In the Hemiptera especially, where there is an abundace of small forms, they would certainly be useless for the delicate measurments of antennæ and limbs so frequently necessary, and for the proportional dimensions called for in the determination of species.

The following species of Coleoptera are sufficiently isolated or conspicuous to warrent their description apart from any monographic treatment of the genera to which they belong. The types of the three species sent of Prof. Snow remain in his collection, or rather that of the University of Kansas; the types of the remaining species are in the writer's collection.

Ceratina submaritima, Ckll.— Proc. Acad. Nat. Sci., Phila., p. 352, 1897.

Corvallis, Or., ♀ ♀, 29th May, 4th June. 1897 24th, 25th May, 7th June, 1898; ♂ ♂, 15th May, 1897; 25th, 27th April, 7th May, 1898; 21st May, 3rd, 9th June, 1899. Elkton, Or, ♀ ♀ and ♂ ♂, 17t January, 1897.

It seems quite certain in considering Redtenbacher' description of Xiphidium agile, DeGeer, which he considers the same as Orchelimum vulgare, Harris, that he took for his type of the species what is generally identified as O. vulgare. His figure (80) is also a typical vulgare. He says the elytra not at all or scarcely exceeding the hind femora, very little shorter than or equalling the wings. All the femora unarmed. These are charactes of O. vulgare, Harris.

Trioza Kobelei, sp. n. — The figures of the tegminal neuration and of the male genital segment in profile, and the following brief description, will distinguish this destructive form from the three other North American Trioza species. Head and thorax varying from dark fulvous to blackish polished, shining. Antennæ testaceous, exceptapically. Tegmina and wings hyaline, colourless, nervures brownish. Femora dark fulvous or blackishbrown, tibiæ and tarsi testaceous, except the apices of the apial tarsal segments. Abdomen smooth, polished and shining, black, with a dark bluish-green gloss.

Diastictis argyralis, Hbn.— Beulah, IX, 14.

Nomophila noctuella, Schiff.—Cartwright.

Loxostege chortalis, Grt.— Aweme, VI, 6, to VI, 19; Souris.

Diasemia plumbosignalis, Fern.— Aweme, VII, 1; Souris; Wattsview.

About ten years ago (see Can. Ent., Vol. XXXVII, Nos. 7 and 8) I published a list of beetles taken by me on the Queen Charlotte Islands. The beetles enumerated below were, except where otherwise designated, taken on the mainland of British Columbia, on the coast between the mouths of the Naas and Skeena Rivers. Some of them were determined for me through the kindness of Dr. James Fletcher, the Dominion Entomologist, whose valuable help and advice I have now for many years enjoyed; the remaider by Professor H.F. Wickham, of Iowa University, to whose skill and courtesy I am deeply indebted.

This paper continues the enumeration of the species of Halictus found in Maine, begun in the Canadian Entomologist for February, 1905, page 40.

Halictus similis, Smith, ♀ ♂.— A very common species in this locality, taken from June 19th to August 24th. It visits a great variety of flowers, as the blackberry, Iris versicolor, Sagittaria latifolia, Aralia hispida, Cornus Canadensis, and teh thistles and goldenrods. Professor Cockerell, who has examined Smith's type in the British Museum, states that the Maine specimens agree with it in all the more important characters.

Colletes Vierecki, n. sp.—♀. Length, 11–12 mm. Shining black, form stout, body almost bare. Clypeus slightly convex, not sulcate, closely striato-punctate, sparsely clothed with short, pale pubescence. Supraclypeal area convex, shining and impuncatate medially, and with crowded punctures on the margins. Face crowded with good sized punctures, and with very short, erect, pale pubescence. Antennæ black, the flagellum more or less dull brownish beneath, the scape deeply punctured, joint 3 a shade shorter than 4, decidedly shorter than 5 and the following, which are shorter than wide.