Revision of Ephydrini Zetterstedt (Diptera: Ephydridae) from the Americas south of the United States Author Mathis, Wayne N. Author Marinoni, Luciane text Zootaxa 2016 4116 1 1 110 journal article 274475 10.11646/zootaxa.4116.1.1 99249a81-fbb8-40be-8684-679b248a904c 1175-5326 257322 22D15539-E49E-4D6C-BFCF-D4DBC72BA640 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.