Three new species of Pseudosympycnus (Diptera, Dolichopodidae) from Peru and an updated key to the species Author Soares, Matheus Mickael Mota Instituto Nacional de Pesquisas da Amazônia (INPA), Programa de Pós-Graduação em Entomologia (PPG-Ent), Manaus, AM, Brasil. matheusmmsoares@gmail.com Author Ale-Rocha, Rosaly Instituto Nacional de Pesquisas da Amazônia - (INPA), Coordenação de Biodiversidade, Manaus, AM, Brasil. text Revista Brasileira de Entomologia 2022 e 20220005 2022-05-04 66 1 1 10 http://dx.doi.org/10.1590/1806-9665-rbent-2022-0005 journal article 10.1590/1806-9665-RBENT-2022-0005 1806-9665 13196994 46C154A4-616D-4324-AFEE-84C8F95E945A Pseudosympycnus bicolor Robinson ( Figs. 1A , 4A ) Pseudosympycnus bicolor Robinson, 1967: 902 , Figs. 10–11. Type locality: Rio Valle Nacional , Oaxaca , Mexico . Diagnosis. As in Soares and Capellari (2020) plus the femur III brown, except basal 1/3 yellow, with few slender ventral setae at basal 1/3 and 3–4 ventral strong setae near middle ( Fig. 4A ); tibia III slightly thicker than tibiae I and II, with ventral row of short, curved setae from base to apical 4/6 ( Fig. 1A ) Distribution. Mexico ( Chiapas and Oaxaca ). Remarks. Pseudosympycnus bicolor is similar to P. latitarsus sp. nov. by the IIIt 3 modified (mostly triangular and overlapping the base of IIIt 4 and with apical cluster of setae). But P. bicolor can be differentiated by the metepimeron and coxa III brown (metepimeron and coxa III yellow in P. latitarsus sp. nov. ) and tibia III slightly thicker than tibiae I and II, with ventral row of short, curved setae from base to apical 4/6 (tibia III unmodified in P. latitarsus sp. nov. ).