For some time the writer has noticed in the genus Orthotylus Fieb., that the flavosparsus group of species present characters worthy of generic recognition namely: dorsum bearing two types of pubescence, simple hairs intermixed with recumbent, scale-like pubescence; left genital clasper represented by a simple curved hook, not bifurcate into two nearly equal parts as in typical Orthotylus. The genus Orthotylus Fieb. (type nassatus Fab.) is characterized by bearing only simple pubescence, while the left genital clasper is bifurcate near base, thus divided into two prominent arms (see figures 83-87, Hemiptera Connecticut, 1923). These two groups of species differ more widely than many recognized genera in the family Miridae, hence the writer proposes to recognize them as valid genera.

The following notes have accumulated while collecting and naming species of Miridae during the past ten years. The records are chiefly of species where the distribution is new or of special interest, or to give data on host relationships. I wish to take this occasion to acknowledge the assistance I have received from several botanists who have from time to time determined plants for me.

Smerinthus cerisyi ophthalmicus Bdv. Four ♂, two ♀, June 24, 25, July 5, 13.

Paonias myops occidentalis Clark. One ♂, June 2.

Haemorrhagia diffinis rubens Hy. Edw. Three ♂, June 5, 6, July 7.

Proserpinus clarkiae Bdv. One ♀, captured in the daytime at D'Arcy, Anderson Lake, on June 17.

The North American species of Trichoceridae belong to three genera, Diazosma Bergroth (subsinuata Alexander), Paracladura Brunetti (trichoptera Osten Sacken) and the dominant Trichocera Meigen, with numerous species, some of which are widely distributed throughout the Holarctic Region. The scope of the family, its phylogenetic relationships, and a key to the known genera, are all discussed in a recent paper by the writer. (The Trichoceridae of Australia; Proc. Linnean Soc. N. S. W., 51 : 299—304; 1926) and need not be considered further at this time.

This paper is to record the discovery of a mayfly nymph of very surprising form. It comes from the Ogden River in Utah. I collected it along with other aquatics on a hasty trip to that river, just before leaving Utah in July, 1926.

Shannon's “Revision of the Chilosinae” includes keys to the species of the various genera of the group but in some cases no descriptiolls of the new species are included. In the key to Cartosyrphus the characters separating some closely related species are difficult to interpret. The male of C. similis Shan. is separated from tristis Lw. by the slightly more swollen first segment of the posterior tarsi. While this character is quite satisfactory in the female it cannot be relied upon in the male. In order to verify observations made several years ago when I compared specimens with the types of the two species mentioned I wrote to Dr. Banlis requesting information on the colour of the squamal cilia.

A collection of mosquitoes taken in Baffin Land, in 1925, by Mr. J. Dewey Soper, of the Department of Mines, has been received, recently, from Dr. R. M. Anderson of the Victoria Memorial Museum, Ottawa. The collection consists of eighty-four adults, two of which are males and the remainder females, and ten larvae. These specimens are of particular interest in that they are the first to be received from this island, and add to our rather scanty knowledge of the mosquito fauna of northern Canada. The collections were made on the east side of Nettilling Lake, the larvae being taken on June 28, and the adults on June 30 and July 9, 17 and 22.

From a study of a large series of specinlens of Odontomerus it seems evident that O. canadensis Prov. is not separable from O. mellipes Say and the above synonymy is suggested. Some specimens agree very well with the characters given in Rohwer's key while others show a complete intergradation of characters and cannot be associated with either form.

During the summer of 1926, while collecting in Orillia, numerous small flies were observed on old fence posts in the hot sun. It was presumed that they represented some common species of Agromyzinae and only six specimens were captured after much difficulty, four of these proving to belong to a beautiful undescribed species of Mallochiella. In Melander's key to the Milichiinae (Jour. N. Y. Ent. Soc., XXXI, 1913) the members of this genus trace to Hypaspistomyia Hendel, an Asiatic genus, but the oral margin is not retracted. The carinate lunule is variable both in size and color in M. halteralis Coq. but always separates the antennae.