Subgenus Parapyrellia Townsend, 1915 Parapyrellia Townsend, 1915: 97 (as genus). Type species: Musca violacea of authors nec Fabricius [misidentification, = Pyrellia maculipennis Macquart, 1846]. Diagnosis. Colouration metallic greenish-blue to violaceous-blue with silver pruinosity; wing with maculae on humeral vein, on apex of Sc and R1, on apex of R2+3 and on r-m and dm-cu crossveins. Female with proclinate fronto-orbital seta undeveloped; parafrons setulose on upper half; interfrontal seta absent. Dorsocentrals 2+4, but they can be reduced to 0+ 2 in M. oportuna (Albuquerque & Lopes, 1979). Intrapostalar absent. Prosternum bare. Katepisternals 1+2. Proepisternum setulose (bare in M. humeralis). Meron bare. Wing with the basal portion of stem-vein setulose ventrally; apical portion of stem-vein setulose dorsally; R4+5 setulose dorsally and ventrally; M bent forward towards R4+5. Lower calypter enlarged posteriorly, extending under base of scutellum. Subcostal sclerite bare. Male mid femur with a dorsal preapical protuberance bearing a set of modified (hook-like) setulae (Fig. 17). Calcar strong. Distribution (3 species). Neotropical. References. Albuquerque and Lopes (1979), de Carvalho and Couri (2002). Subgenus Trichomorellia Stein, 1918 Trichomorellia Stein, 1918: 204 (as genus). Type species: Trichomorellia boliviana Townsend, 1931 [= Dasymorellia trichops Malloch, 1923]. Diagnosis. Colouration metallic blackish-blue to dark greenish-blue with silver pruinosity; wing usually with maculae on humeral vein and on apex of Sc and R1. Eye densely setulose, particularly the males. Female with proclinate fronto-orbital seta; interfrontal seta absent; frontal vitta bare or densely setulose on upper half. Presutural acrostichals developed; 2 or 3 postsutural pairs. Dorsocentrals 2+4. Posthumeral present; postsutural intra-alars 2; intrapostalar present. Prosternum bare. Katepisternals 1+2. Wing with the basal portion of stemvein setulose ventrally; R4+5 setulose dorsally and usually also ventrally; M bent forward towards R4+5. Lower calypter glossiform. Subcostal sclerite bare. Male mid femur with a dorsal preapical protuberance bearing a set of modified (hook-like) or non-modified setulae. Calcar strong. Comments. For a long time, the name Dasymorellia Malloch was used instead of the earlier Trichomorel - lia. This confusion was clarified and the name usage corrected by Pont et al. (2005). Distribution (8 species). Neotropical. References. Pamplona (1983, as Dasymorellia), de Carvalho and Couri (2002, as Dasymorellia), Pont et al. (2005).

Published as part of Nihei, Silvio Shigueo & Carvalho, Claudio José Barros De, 2009, The Muscini flies of the world (Diptera, Muscidae): identification key and generic diagnoses, pp. 1-24 in Zootaxa 1976 on pages 14-15, DOI: 10.5281/zenodo.185153