Boreus intermedius Lloyd, 1934
Diagnosis: Body length: male, pinned 3.5 mm; female, pinned 4.5 – 4.6 mm; male, in alcohol 5.0 mm. Ratio of length of maxilla-labial complex to rostrum = .91. Pro-, meso-, and metanota without bristles; thorax covered with short, dense, white pilosity. Male forewings yellowish-brown, abruptly narrowed at mid-length, with 33 mesal bristles and 10 outer bristles. Hindwing lacking bristles. Female forewing oval, covering hindwing. Male 8th tergum and sternum fused; 9th tergum and sternum unfused. Hood of male 9th tergum large, about half width of tergum, with a short medial ridge that is divided ventrally. Apex of male 9th sternite truncated.
Distribution – Geographical: This species is only known from Kennicott and McCarthy, Alaska, at the base of the Kennicott Glacier, near Fireweed Mountain in the Wrangell Mountain Range. All known specimens were collected by Wilbur Lloyd in 1934 and 1935.
Distribution – Temporal: Adults have been collected from 15 - 29 April at 1400 – 2000 feet (427 – 610 m) elevation.
Ecology: Nothing is known about habitat for this species, other than the fact that adults were collected near a glacier.
Biology: Nothing is known of immature stages or life cycle.
Notes: This species is a member of the californicus species group having males with fused 8th tergum and sternum and 9th tergum and sternum unfused. There is a large male hood with a medial ridge. It differs from other members of the group by having a short medial ridge of the hood that is divided ventrally, and relatively sparse pilosity beneath the tergal hood.
Lloyd, L.C. 1934. Two species of Mecoptera from Alaska. Pan-Pacific Entomologist, 10:119-120.