Mitinha and Tamanduamyia, two new genera of Mythicomyiinae (Diptera, Mythicomyiidae) from northeast Brazil Author Rafael, J. A. Instituto Nacional de Pesquisas da Amazônia, INPA, Coordenação de Biodiversidade, Caixa Postal 2223, 69080 - 971 Manaus, Amazonas, Brazil. E-mail: jarafael @ inpa. gov. br Author Limeira-De-Oliveira, F. Universidade Estadual do Maranhão, Laboratório de Estudos dos Invertebrados, 65604 - 380, Caxias, Maranhão, Brazil. text Zootaxa 2014 2014-07-07 3827 4 591 598 journal article 5312 10.11646/zootaxa.3827.4.9 bc5f7c6e-ffec-4b54-8b61-2371f151bce1 1175-5326 4920784 0DA04CAF-C611-440A-A6C1-37043AE02CC0 Key to genera of Mythicomyiinae of the world (modified from Evenhuis 2002a ) 1 Antenna with one flagellomere ( Fig. 14 ). Stylus distal, tiny, inconspicuous (visible only in higher magnification); postcranium produced, subequal to eye length ( Figs 12, 13 ).......................................... Tamanduamyia , gen. nov. - Antenna with two flagellomeres and stylus placed apically ( Fig. 2 ) or subapically on the second flagellomere ( Fig. 21 ); postcranium not produced ( Fig. 1 )....................................................................... 2 2 Antenna with stylus placed apically on second flagellomere.................................................. 3 - Antenna with stylus placed subapically on second flagellomere ( Fig. 21 ).......................................... 4 3 Vein A 1 complete, reaching wing margin ( Fig. 22 ); costal vein incomplete, ending between R 4+5 and M 1 veins......................................................................................... Mythenteles Hall & Evenhuis - Vein A 1 short, incomplete, reaching alular incision level; costal vein circumambient ( Fig. 3 )........... Mitinha , gen. nov. 4 Costal vein circumambient; cell dm fairly short, closed apically ( Fig. 23 )...................... Reissa Evenhuis & Baéz - Costal vein incomplete, ending just beyond end of vein R 4+5 . Cell dm much longer than wide ( Figs 24, 25 ) or open apically. 5 5 Wing with well-developed keel-shaped anal lobe; vein separating basal cells not evident ( Fig. 25 ); males holoptic................................................................................................ Mythicomyia ... 6 - Wing with anal lobe normal, not keel-shaped; vein separating basal cells distinct, often well sclerotized ( Fig. 24 ); males dichoptic........................................................................................... 7 6 Males with secondary sexual character modifications on the legs (modified shapes of and notches in mid and/or hind legs and presence of pegs and large setae).......................................... Mythicomyia ( Mythicomyia ) Coquillett - Males without secondary sexual character modifications of legs..................... Mythicomyia ( Heterhybos ) Brèthes 7 Wing with cell dm open, distal veins faint or effaced; head as wide as or wider than thorax......... Nexus Hall & Evenhuis - Wing with cell dm complete ( Fig. 22 ); distal veins not faint; head usually narrower than thorax........... Pieza Evenhuis