As a rule the genitalic organs of insects are mounted on standard glass slides. These slides have to be kept separate from the specimens they represent in a slide-box by themselves and for this reason there is always a chance of misplacement or loss due to eventual separation. Another point is that the all-glass slides are more easily breakable and are apt to “age” as the years go by.

The moth Anisota manitobensis was described by Dr. J. McDunnough of Ottawa in “The Canadian Entomologist” (Vol. LIII, No. 4) from four specimens taken by Mr. N. Criddle at Aweme, Manitoba. The early stages of this moth have been unknown up to the present. I have recently had the opportunity of studying these and the following notes are offered as a result.

Male. Length, 2.1 mm. Cephalothorax dusky orange, very lightly marked with radiating lines; viewed from above, rather broad, evenly rounded on the sides, narrowed towards the front, broadly rounded in front; viewed from the side gently rounded to the posterior eyes. Clypeus straight and slightly protruding. A tooth on the face of the chelicera.

The following notes were compiled while working over a collection of Lepidoptera taken by me in the Yellowstone Park, Wyoming and the Upper Gallatin Canyon, Montana during the latter half of July and the first part of August of the summer of 1928.

Length 2.5-3.4 mm.; width 1.2-1.4 mm. Short and robust. Dorsum dark brown, scarcely bronzed; head, pronotum and elytral intervals with closely placed, round, green spots; venter dark reddish brown; legs brown, the femora dark, the tibiae and tarsi pale.

Male blackish; head with frontal vitta opaque black, faintly tinged with red at base of antennae; parafacials and cheeks grayish pruinescent with reddish to black reflections; antennae and palpi black; arista paler on distal portion. Thorax and abdomen subshining with dark reflections, the former lightly brownish pollinose, viewed from behind with three faint, narrow vittae; the latter more densely pollinose, each tergum with a broad black subtriangular mark, hypopygium shining. Legs blackish. Wings tinged, more intensively basad, but not blackened; veins dark brown. Calyptrae tinged, halteres yellow.

Subelliptical-elongate, upper surface of body clothed with short, silvery pubescence. Head and thorax black; elytra rufo-castaneous, with suture darker.

Head rounded in front, three strong foveae in a line near the base. Eyes coarsely granulate. Mouth parts and antennae flavous, the latter with a slender club composed of the last three joints.