Four new Neotropical species of Trigonometopus Macquart, 1835 (Diptera, Lauxaniidae) Author Lima, Ângela Maria Alves de Author Silva, Vera Cristina text Papéis Avulsos de Zoologia 2015 São Paulo 55 9 131 142 http://dx.doi.org/10.1590/0031-1049.2015.55.09 journal article 10.1590/0031-1049.2015.55.09 1807-0205 4656507 Key for the Neotropical species of Trigonometopus 1. Body grey; wing with brown bands ( Fig. 1D ); ocellar setae longer than posterior fronto-orbital seta ( Fig. 1A ) ............................................................................................... T. assisensis Lima & Silva , sp. nov. — Body brownish or yellowish; wing unspotted or with stripes; ocellar setae no longer than posterior frontoorbital seta or absent ...............................................................................................................................2 2. Wing membrane with milky costal margin extending to apex of vein R 4+5 ................. T. albocostatus Hendel — Wing membrane without milky costal margin ...........................................................................................3 3. Presutural dorsocentral seta present............................................................................................................4 — Presutural dorsocentral seta absent .............................................................................................................7 4. Wing hyaline; pleural region dark; prescutellar acrostichal setae tiny; dorsocentral setae 1+2 ....................... ....................................................................................................................... T. immaculipennis Malloch — Wing infuscated, sometimes spotted; pleural region pale; prescutellar acrostichal setae well developed; dorsocentral setae variable ............................................................................................................................5 5. Wing membrane with two dark spots along the apical section of vein R 4+5 ; dark spots at both ends of dm-cu crossvein ( Fig. 4D )..................................................................................................................................6 — Wing without spots .............................................................................................. T. rotundicornis Williston 6. Wing infuscated at costal and anterior margins.......................................... T. mariae Lima & Silva , sp. nov. — Anterior margin of wing not infuscated ............................................................... T. punctipennis Coquillett 7. Ocellar seta present....................................................................................................................................8 — Ocellar seta absent .....................................................................................................................................9 8. Wing hyaline; pleura yellow; apical scutellar setae with setigerous spot ............................. T. albifrons Knab — Wing infuscated ( Fig. 3D ); pleura brownish; apical scutellar setae without setigerous spot .......................... ............................................................................................................ T. lourdesae Lima & Silva , sp. nov. 9. Genal margin with dark stripe; postocellar setae convergent; apex of first flagellomere almost triangular ..... ............................................................................................................................... T. angustipennis Knab — Genal margin not darkened ( Fig. 2A ); postocellar setae cruciate ( Figs. 2B‒C ); apex of first flagellomere rounded ........................................................................................... T. boraceiensis Lima & Silva , sp. nov.