Explanation of Names
Etymology obscure. Author of the genus is Stal, 1859 (or 1860?). Perhaps Rhiginia is somehow based on Rhigi, a mountain in Switzerland (also in Massachusetts). In addition, Rhigia is a genus of syrphid flies. Perhaps an eponym? (Based on Internet searches.)
Numbers
Nearctica.com lists two species in genus (cruciata and, cinctiventris) as do Slater
(1) and Arnett, p. 265
(2) Identification
Similar to Apiomerus, but even stronger red/black pattern.
Range
R. cruciata occurs in eastern North America. R. cinctiventris is found from Louisiana to Arizona.
Print References
Taber, p. 81, fig. 69, discusses life history, range, of R. cinctiventris.
(3)