B. posticata var. brunnea var. nov.
A race of posticata from Ontario and Manitoba has the light vestiture brown instead of yellow and the ground color of the abdomen somewhat metallic bluish, otherwise the specimens agree with posticata. Some of the hairs on the scutellum may be brownish.
Holotype. [Male], Macdiarmid, Lake Nipigon, Ontario. Aug. 24, 1923 (N. K. Bigelow).
Paratypes. [Males], Victoria Beach, Manitoba. July 22, 1923, and two July 22, 1922; (G. S. Brooks).
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