Sargus fulvithorax ( Bigot, 1879 ) Fachin & Hauser, 2018

Fachin, Diego Aguilar & Hauser, Martin, 2018, Taxonomic revision of the Neotropical genus Himantigera James, 1982 (Diptera: Stratiomyidae: Sarginae), including the description of two new species and a key to the known species, Zootaxa 4531 (4), pp. 451-498 : 495-496

Sargus fulvithorax ( Bigot, 1879) comb. nov.

Chrysonotus fulvithorax Bigot, 1879: 228 . Type locality: Brazil, “Amazonia”. Syntype ♀ [unknown depositary institution].

Geographic distribution. Brazil (“Amazonia”).

Comments. As the female type is currently lost, our recombination is based only on the original description of Bigot (1879), who mostly described coloration. The species is mostly yellow, except the vertex and upper frons that are dark metallic blue, the wings are grey, and the abdominal fourth and fifth segments are dark brown with metallic purple reflections. The abdomen was described by Bigot (1879) as being metallic purple with three transverse triangular yellow maculae at the base (probably the first segment). It is likely that this species is closely related to S. analis and S. flavoniger , or possibly even related to S. dichrous because of its metallic abdomen. As this description appears to most reliably place the species in Sargus , it will be transferred there until further material is available, but this color pattern clearly excludes it from Himantigera .