ChrisR

This taxon group contains at least 7 species ranging in size, with a light brown ground colour, broad bodies and darker coloured abdomens. They have plumose antennae and quite a strong subscutellum but, after checking with the Manual of Central American Diptera (Brown et.al., 2009), it appears that most of them belong to the subfamily Mesembrinellinae (Calliphoridae). In Europe having a rounded subscutellum would virtually guarantee that it was a tachinid but in the neotropics that feature cannot be fully relied upon. The Mesembrinellinae have hairs under the scutellum and a differently-shaped metathoracic spiracle with secondary features such as the strongly curved median vein and the plumose antennae.

As you can see, the second taxon (type-c) is very different from the rest – having completely different wing venation and strong bristles on the abdomen. This suggests that it really is a tachinid this time so it will be the first to be split off from fg-taxon #16 but for now it stays here due to its rough similarity to the others.

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