Indiopsocus bisignatus

Common Barklice
Idiopsocus bisignatus

Identification:

Barklice Indiopsocus bisignatus came to moth light July 12, 2011 Wheatley, Ontario.
Barklice Indiopsocus bisignatus came to moth light July 12, 2011 Wheatley, Ontario.

Head: Black. A rounded, raised area above mouth (nasus) with eight pale lines. Top of head convex with two prominent pale spots or stripes, and pale marks down face front from the simple eyes (ocelli). Males have large eyes.
Antennae: Base darker. Antenna shorter than wings; segments pale brown, with very short fine hair.
Thorax: Segment 1 has yellowish middle line and yellowish at side edges. Segment 2 black with a pale spot at center.

Barklice Indiopsocus bisignatus came to moth light July 12, 2011 Wheatley, Ontario.
Barklice Indiopsocus bisignatus came to moth light July 12, 2011 Wheatley, Ontario.

Legs: Pale yellowish-brown, feet slightly darker.
Wings: Hyaline, an incomplete black band on inner wing edge from base to about mid wing. Stigma triangular, black base, large white area and wide, expanded dark band at end. Veins dark, except at wing center, where two veins are partially white to yellowish.
Abdomen: Black with segments narrowly margined in yellow or cream. Male has two brown spots near tip.

Size: 6 mm to wing tip.

Flight Time: July

Habitat: In trees mostly.

Food: Lichens, debris and old bark.

Barklice Indiopsocus bisignatus came to moth light July 12, 2011 Wheatley, Ontario.
Barklice Indiopsocus bisignatus came to moth light July 12, 2011 Wheatley, Ontario.

Life Cycle: Generally, eggs are laid singly or in clusters. Nymphs resemble tiny wingless adults. 6 instars. Live together in groups. Elaborate courtships. Probably over-winter in egg stage.

Comments: Not listed for Ontario by Natural Heritage Information Centre (NHIC).

Synonyms: Banks 1904
Psocus bisignatus

References:
Proceedings of the Entomological Society of Washington, 1904. Vol. 6, by Banks, pg. 203.
Journal of the New York Entomological Society, 1930, Vol. 38 by Chapman, pp. 229 to 230.

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