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Bark Louse - Graphopsocus cruciatus

Bark Louse - Graphopsocus cruciatus
Seattle, King County, Washington, USA
July 12, 2007
Size: 2.5mm
Found at porch light at night.


Graphopsocus cruciatus
I agree with "psocoptera". The wing markings and vein patterns on this species is unlike most other Psocoptera in North America...five dark black marks in the first half of the wing and a light beige "F" mark in the second half of the wing. A species of Cerastipsocus also has an "F" but the discoidal cell (in the centre of the wing) is very different. Graphopsocus cruciatus; Family Stenopsocidae is thought to have been introduced in the 1930 to both the east and west coast from Europe or Asia. After quickly spreading up and down both coasts it is now slowly moving inland.

Thank you both!
These are extremely common in my yard, usually underneath the leaves of various broad leaf evergreens.

FAmily Stenopsocidae, genus G
FAmily Stenopsocidae, genus Graphopsocus could be crusiatus

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