Explanation of Names
Rivellia Robineau-Desvoidy 1830
Wave wings. Often difficult to identify from photographs. To increase the chance of ID, we need a clear, crisp view of the dorsal thorax (to see whether certain setae are present or absent), wing, and legs (to see the color pattern).
Worldwide, incl. most of the Americas(1)
, e. NA to s. CA (BG data)
mostly: May-Aug (BG data)
Adults seen feeding on feces in Durham, NC (P. Coin, pers. obs.)
R. quadrifasciata lays eggs on leguminous plants; larvae bore into root nodules.
Namba, Ryoji (1956). A revision of the flies of the genus Rivellia
(Otiidae, Diptera) of America north of Mexico. Proc. U. S. Natl. Mus. 106: 21-84. (PDF
, or read online at BHL