This interesting aphid (2) is found quite commonly throughout Utah on rabhit brush (Chrysothamnus nauseosus). It was exceptionally abundant along the foothills of the Wellsville Mountains north of Brigham City during the fall of 1926. The oviparous and most of the viviparous forms observed are wingless, while the males are winged.

The half-tone illustrations of the butterfly transition forms, herein described, vary somewhat in size from the actual specimens; therefore, a reference to their wing expanse, as given in the text is advisable. The classification of these specimens follows that outlined in the November, 1927, Entom. News (Philadephia) and which was first suggested in that publication.

In the early summer of 1926 I spent nearly two months in the vicinity of Lillooet, B. C., a typical “dry-belt” locality, studying the insect fauna of this region. My headquarters were at Craig Lodge, at the east end of Seton Lake, a large body of water about three miles west of Lillooet draining into the Fraser River through Seton Lake Creek, which is joined about a mile to the east by the larger Cayoosh Creek, entering from the south through the deep and precipitous Cayoosh Canyon. The general nature of the country has already been ably indicated by Mr. R. Glendenning in a paper on the Fauna and Flora of Mt. McLean which appeared in the Proceedings of the British Columbia Entomological Society for 1921.

Allied to basicornis Kngt., but easily distinguished by the much larger size, shorter rostrum which only attains posterior margin of sternum, and by the fuscous markings of the male.

Maxillary lobes membranous. Mandible with molar corneous, lacinia membranous.

Head wide, strongly deflexed. Front not tuberculate or carinate. Eyes hidden in repose. Clypeus apparently broadly emarginate when viewed from above; in reality not emarginate, the apex being bent ventrad and caudad, this inflexed portion short and limited above by a fine carina.

The series I-b of Aphodius was erected by Dr. Horn for those of our species which have the fore tibia punctate on the anterior face and the first segment of the anterior tarsus longer than the second. Horn including two species, rubeolus and stercorosus, in this group, overlooking the fact that two additional species known to him, lentus and tenuistriatus, possessed these characters. Subsequently, troglodytes and campestris were described by Hubbard and Blatchley respectively. The present paper includes the six species noted above and adds two which are described as new. Aphodius canadensis Garnett, described as a member of this group, is omitted, for in it the anterior tibia is impunctate, the first segment of the anterior tarsus is shorter than the second, and the pronotal side margins are explanate; the species is a member of series I-a.

Osborne and Lathrop have recently given us a very valuable revision of the North American forms of the genus Phlepsius. Their keys and illustrations should make it possible for those interested to make accurate determinations in what has been a very difficult group. The writer in working his material over with the help of this revision found few cases where changes appear to be necessary and most of these were apparently due to the limitations of the material at that time available.

♀. Eyes small, ciliate: palpi light ochreous with rough dark hairs; vestiture of head and thorax rough, hairy, dark gray; abdomen light gray with yellow terminal tuft. Primaries pale yellowish, heavily sprinkled with black, producing a dull olivaceous appearance; maculation distinct; t. a. line heavy, black, upright, forming three moderate outcurves of which the central one is the largest, t. p. line dentate, ercurved below costa, then inwardly oblique to inner margin with slight incurve below cell, faintly marked outwardly with pale yellow; median shade diffuse, oblique from costa across reniform, then close and parallel to t. p. line; orbicular moderately large, round, pale-filled, outlined in black; reniform rather narrow, upright, partially outlined in black and obscured by median shade; subterminal and terminal areas rather evenly dark smoky; s. t. line obscure, pale, rather even, emphasized by slight smoky preceding shade; fringes blackish in basal half, cut opposite veins by pale ochreous, paler smoky in outer half.

Male. Head and thorax deep black-brown, pleura tinged with lighter brown: the mesothorax broad for the size of the insect and with the axillary cords scarcely extended beyond tip of scutellum. Abdomen with segments 1-6 and the anterior half of 7 dull semibvaline whitish with traces of a fine ruddy dorsal line and lateral rows of small ruddy spots or streaks situated one on each segment in the central area: posterior half of 7 and 8-10 opaque pinkish brown, paler ventrally: forceps pale tinged with brown a prominent tubercle situated between the limbs at base:setae white unbanded. Fore legs with the femora light sepia-brown tibiae and tarsi dull whitish the former shaded slightly with sepia at base tibia rather long more than twice as long as the femur and subequal to the entire tarsus: mid and hindlegs whitish the femora tinged with brown, femora and tibiae subequal. Wings hvaline with a brown tinge at extreme base: veins and crossveins pale. Length of body, 5 mm : of forewing 5 mm.

Female. Length 8-9 mm. Body shining black clothed with whitish hairs; the following parts rufous; palpi, middle of mandibles usually, labrum, antennae except the two basal segments above (in some specimens the two basal segments are entirely dark), legs beyond trochanters, and abdomen beyond the basal plates. Segments 2-5 of the abdomen above with dark transverse bands across the middle most pronounced on basal segments and decreasing apically. Wings yellowish with stigma and veins, except costa, brownish.

Nemoria darwiniata Dyar. A single ♀, June 15.

Nemoria hudsonaria Tayl. Quite common during the latter half of June. In a few of the specimens the inner transverse lines are obsolete and these could as well be placed under unilinearia Tayl. as under hudsonaria. I am not sure at the present time whether the differences given by Taylor are of specific value and until I can study the matter further I use the older of the two names.

Of a total of approximately one-hundred and fifty species of Microlepidoptera collected and reared by the writer in July, 1926 at Sparrow Lake, Severn Bridge, Ontario, the following seven species are described as new. Additional notes on a few previously described species are also included.

That four species of Papaipema, Papaipema stenoscelis Dyar, P. speciosima G. & R., P. inquaesita G. & R. and P. pterisii Bird, persist in making a food choice among the Cryptogams, those plants whose ancestry dates so far back in the floral phylum, might suggest that this quartet should show evidence of being the fore-runners of their generic complex.

In the Fifty-sixth Report of the Entomological Society of Ontario, Mr. H. L. Viereck records a queen of Bremus kincaidii (Cockerell) from “Winter Ft. [specimen is labeled Winter H], Melville I [slandl, July 20, 1909 (F. C. Hennessey).” Due to the kindness of Dr. J. McDunnough this specimen was sent to me for examination. It proves to be either an unusually small queen, or a worker, of Bremus hyperboreus (Schonherr).

The members of this genus are all small and globose and are easily separated from other Cercopidae, but here the easy part abruptly ends. The varieties are widely variable in size, form and color, ranging in most species from large pale forms through spotted, striped and variously ornamented ones on down through coppery and bronzy shades to small black forms at the other extreme. The representatives of this group are distributed through North and South America where some 68 or 70 different forms have been named. All of the earlier ones and most of those of later date have been founded on size and color markings alone, which vary with the sex, the food plant, the environment and in some cases at least with the season. Under the circumstances it is manifestly impossible to determine the number of species involved or to work out a stable nomenclature until extended collection and careful life history has been done in the areas involved.

Length 2.8-4 mm.; width 1.9-2.6 mm. Broadly oval; shining; black, the trophi, tibiae, and tarsi piceous ; body with short brownish-yellow hairs.

While collecting at Birch Glen in Logan Canon, Utah, on June 18th, 1926, I first came upon the nymph of the mayfly (Rhithrogena mimus Eat.) that is the subject of this article. I was gathering aquatic insects from among the larger stones in a swift portion of the river. Dipterous larvae of Simulium and Bibiocephala were common, and the nymphs of the big mayfly Ephemerella doddsi (locally called the “ginger quill”) were appearing on my hand screen, when along with them appeared a few peculiar mayfly nymphs with broadly expanded gills of a bright rose-red color. I quickly got some of them into a rearing cage and in a few days had sub-imagos, and later adult reared specimens, of the species described below.

Sericosema wilsonensis C. 8; S. Two males which seem to belong to this species according to genitalia were taken on July 8; the species differs from juturnaria in its sinaller size, lack of the strong ruddy tinges on the underside and in the position of the dark line on underside of secondaries which in wilsonensis is nearer the middle of the wing and more evenly rounded. There is a further specimen in the Canadian National Collection from Salmon Arm, B. C., July 18 (A. A. Dennys). The species does not appear to have been previously recorded from British Columbia.

In the Canadian Entolnologist for November, 1925, I reviewed tne Canadian species of Lydella Desv. As certain changes in the terminology therein proposed are necessary it seems advisable to review the related forms and present a key to the genera concerned. The species under discussion, with some exceptions, trace to Masicera Macq. in keys dealing with the Nearctic fauna and the key to the genera may be used to supplement those in Williston's Manual, 1908, and Coquillett's “Revision.”

Brachyrhinus rugosostriatus Goeze (rugifrors of American writers, in part, not Gyllenhal.