Subgenus Paracoenia Cresson

Paracoenia Cresson 1935: 356 (as a genus). Type species: Coenia bisetosa Coquillett 1902, original designation.

Diagnosis. This subgenus is similar to the subgenus Thiomyia Wirth but is distinguished by the following combination of characters: Generally olivaceous gray to dark greenish or bluish brown; setation generally well developed.

Head: Frons short. Antenna slender, basal flagellomere longer than wide; arista with dorsal rays about equal in length to length of basal flagellomere. Face high, height more than twice length of largest setae along oral margin; face generally conspicuously setose; antennal grooves evident but not as concave as Thiomyia .

Thorax: Dorsocentral setae 5; postsutural supra-alar seta well developed, subequal to length of anterolateral, postalar seta; katepisternal seta well developed. Wing generally hyaline to faintly infuscate. Femora more swollen than in Thiomyia, nearly twice width of tibiae; midfemur of male with comb-like row of setae along posteroventral margin; tarsomeres normally developed, cylindrical, not explanate, pulvilli evident, well developed. Halter whitish yellow to yellow.

Abdomen: Tergites wide, particularly tergite 2 and tergite 3, each 3X wider than long; tergite 5 of male generally with a ventrolateral process oriented along plane of body.