Agraylea (Salt & Pepper Microcaddis)	Copyright © Aquatic Bioassessment Laboratory	Copyright © 2007 Tom Murray
WA species: Agraylea multipunctata Agraylea saltesea (2) WA species	Body laterally flattened; front legs are much shorter than the others; middle segments of the front leg are thick/broad; portable purse-case, made of filamentous algae and silk wrapped in a concentric pattern; never longer than 6.5 mm.	Body length: 5 mm. Body: green. Wings: speckled gray and white.

Hydroptila (Vari-colored Microcaddis)	Copyright © Aquatic Bioassessment Laboratory	Copyright © 2009 Tom Murray
WA species: Hydroptila ajax Hydroptila arctia Hydroptila argosa Hydroptila consimilis Hydroptila hamata Hydroptila modica Hydroptila rono Hydroptila xera (8) WA species	Three thin, white, filamentous gills on the hind end; Habitat: common, both lakes and rivers, feed on filamentous algae. Free-living until pupation, then build silk case; never longer than 6.5 mm..	Len: 4 mm. Body: bright yellow to orange to brown Wings: gray to brown; solid or spotted.

Leucotrichia (Ring Horn Microcaddis)	Copyright © Aquatic Bioassessment Laboratory
WA species: Leucotrichia pictipes (1) WA species	Body strongly flattened from top to bottom w/dark hard parts and a dark, solid (no space/spots in middle) plate on top of each abdominal segs; mid segs of ab widen abruptly; portable purse-case of rock particles and/or silk; never longer than 6.5 mm.	Body length: 4.5 mm. Body: brown. Wings: dark brown to black with a few scattered light spots. White bands around antannae.

Ochrotrichia (Somber Microcaddis)	Copyright © Aquatic Bioassessment Laboratory	Copyright © 2009 Dave Ruiter
WA species: Ochrotrichia okanoganensis Ochrotrichia oregona Ochrotrichia stylata Ochrotrichia trapoiza (4) WA species	Laterally flattened; plates covering tops of thoracic segments; on the 2nd segment before the claw on the front legs is very broad with a spiny lobe on the underside; top of each abdominal segment often has a plate with an oblong space at the front; case with two silken halves covered in fine sand; body length <= 6.5 mm.

Stactobiella (no common name)		Copyright © Bold Systems
WA species: Stactobiella delira (1) WA species	Flattened side to side; plates covering tops of thoracic segsments; front legs have lobe with spines that broadens 2nd segment before the claw; curved claws with tongue-like (stout and blunt) lobe at base; case is constructed of two flat oval halves covered with algae or fine sand.

State/province distribution based on NatureServe Explorer.