1. Wings with distinct infusations

Wings without infuscations

2. Apex of the second vein of the wing very little or not at all infuscated; the other infuscations mainly confined to the veins, faint on the membrane; head large; frons swollen, lemon yellow in fresh specimens; hairs and bristles on ventral part of head and thorax and on legs very fine, golden; abdomen short; (Figs. 37, 64) citreifrons Malloch ( ♂ ) Apex of second vein distinctly infuscated; other characters not as above

Expanse 27-31 mm. Palpi short, stout porrect, vestiture heavy, light brown. Head: front maroon, vertex light brown. Thorax and tegulae red brown, collar light brown; abdomen gray-brown, reddish laterally. Primaries very distinctly maculated, bright reddish brown, veins marked with silver gray, (heavily through terminal area), speckled sparingly with dark brown ; basal line dark maroon edged outwardly with white, very close to base; space to t.a. line maroon; t.a. line dark red-brown, edged inwardly with white; four distinct outward scallops between costa and inner margin, costal pair slight, that between vein I and cell very pronounced with heavy white inner edging and with point of scallop slightly extended outwardly, that between vein I and inner margin, moderate.

The following notes are based on collections made by the junior author and a few other collectors whose names are indicated in brackets. The descriptions of localities, including faunistic observations are also made by the junior author, while the senior author is responsible for determinations and notes on the geographical distribution of the species.

The following notes were made from a study of several species of Arctic Coollembola collected by Mr. W. J. Brown, of the Division of Entomology, Ottawa. Mr. Brown accompanied the voyage of the Canadian Arctic Patrol during August and September, 1935. During the trip he was able to collect on the southern shore of Baffin Island, and also well within the Arctic Circle as far north as Ellesmere Island.