Allied to simplex Uhler, but distinguished by the fine, uniformly pale pubescence, shorter rostrum and more tumid frons.

♂ .Length 5 mm., width 1.8 mm. Head: width 1.09 mm., vertex 666 mm.; frons more tumid than in simplex, pale greenish, becoming fuscous each side of frons and a spot each side of vertex. Rostrum, length 1.09 mm., just attaining hind margin of sternum, pale greenish, last two segments blackish. Antennae: segment I, length .42mm.; II, 1.6 mm.; III, 1.18 mm.; IV, broken; black. Pronotum: length .72 mm., width at base 1.54 mm.; calli becoming blackish on hind margins.

Few political areas in North America offer so much in the way of interest and instruction to the student of the geographical distribution of bumblebees as the Province of Alberta in western Canada. This is due not only to the fact that extremes in elevation between certain portions of Alberta bring together species of pronounced northern and southern tendencies, a condition duplicated in many parts of western North America, but likewise to the fact that Alberta is a meeting ground of species with decided eastern and western affinities. A somewhat similar state of affairs, though less marked, occurs in the Dakotas as attested by a study of approximately 900 specimens of bumblebees from South Dakota submitted to me for determination by Professor H. C. Severin and recorded by him in the “Sixteenth Annual Report of the State Entomologist of South Dakota,” 1925, pp. 17-20.

In my paper on the Ephemeroptera of Covel Hill, Que., I recorded the spccies E. dorothea Needham as extremely common. In the summer of 1927 my assistant, Mr. G. S. walley, took numerous full-grown nymphs in the Covey Hill brook at a time when the so-called dorothea were emerging, so that the association of nymph and adult is fairly safe. These nymphs, however, proved to agree excellently with the description of cornuta Morg. except for the somewhat smaller size, and a careful reading of Dr. Morgan's description of the male subimago (the only other stage known to her) made it evident that the Covey Hill species should be known as cornuta Morg. and not dorothea Needh.

As far as I am aware, there are known at the present time but four species which are referred to this genus. Of these, one is recorded from Florida, one from Texas and Arizona, one from Nicaragua and one from Brazil.

Brightly shining, brown above, lighter ochraceous brown beneath, form more elongate and narrower than most of the fasciated species, such as P. varius and P. nitidus. Length 6.25 mm., breadth 1.75 mm.

In working over a collection of Diurnal Lepidoptera sent me by Mr. R. E. Hutchins of the Montana Agricultural College, Bozeman, Mont. for identification I came across a small series of a Euphydryas species which represents an apparently undescribed race or species belonging, according to genitalia, in the nubigena-taylori-editha complex. This group of so-called species, as I recently pointed out (1927, Canadian Entomologist, lix, 156) is distinguished genitalically by the reduced uncus and the shape of the harpe (op. cit. Pl. III, fig. I), these two organs being practically similar throughout the group.

Black, thorax thinly pollinose; pleura black haired, squamae white. Length 12 to 13.5 mm.

Male. Face and cheeks yellow; head white pollinose; hair black; occipital pile yellowish. Front as wide as either eye, the vitta rusty reddish. Palpi and basal two antennal segments reddish; third antennal segment black, convex above, shorter than second ; penultimate aristal segment elongate, the preceding segment only about one and a half times as long as wide.