Species Stenochironomus hilaris

Stenochironomus Kieffer 1919

Stenochironomus hilaris (Walker 1848)

For the genus Stenochironomus page, quoting from AMN description:

Pronotum very narrow medially, far surpassed by the strongly projecting anterior part of the mesoscutum. Fork of Cu slightly beyond R-M. Ends of R1 and R2+3 very near together, almost fused; ends of R4+5 and M both near the wing apex, R4+5 usually slightly nearer than M; leg ratio 1.1 to 1.5.

(And other stuff that's harder to see in the usual pictures here.)

Description of species, same source:

Male: Pale green, usually somewhat darker green than in other Nearctic species of the genus. Flagellum beyond the first segment and mouthparts brown; lateral lobe of mesoscutum with a brown stripe in front of the wing base; postnotum marked with brown; wing marked with pale fuscous as in [figure]; apical 0.5 to 0.7 of femora brown, the hind femur being more extensively brown than the others; front and hind tibia entirely brown or the front tibia with a borad indistinct pale annulus covering just beyond its middle; middle tibia with its basal 0.3 brown; apical abdominal segments with the usual subcutaneous black blotches; genitalia brown.

Female: Colored like the male except that the wing and femoral dark markings are more extensive and that the front tibia is always entirely brown.

… John F. Carr, 14 December, 2008

American Midland Naturalist 34 (1945) contains a key and description of the Chironomini of North America (called Tendipedini; the ICZN controversially suppressed the name Tendipes in 1963). Those midges with patterned wings are illustrated.

A modern key to adults of Stenochironomus of Michigan is in the UMich collection of all things midgy, UMich