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From the top:
Chrysosmoa snelli Curran, 1927 - Dolichopodidae
Scholastes vicarius Hendel, 1912 - Platystomateidae
next two photographs, the same two species
Physiphora azurea (Hendel, 1912) - Ulidiidae
difficult, but possibly Lonchaea lambiana Bezzi, 1918 or L. minuta de Meijere, 1910 - Lonchaeidae
Neavella albipectus (Bigot, 1859) - Tabanidae