Rhaphiomidas trochilus (Coquillett, 1892)

Valley mydas fly, San Joaquin Valley giant flower-loving fly



Taxonomy & Nomenclature



Conservation Status

Rediscovered in 1997



San Joaquin Valley, California, USA


Biology & Ecology










Original scientific description:

Coquillett, D. W. (1892). The dipterous parasite of Melanoplus devastator in California. Insect Life, Washington 5: 22-24.


Other references:

American Museum of Natural History and Levon Biss (photographer). (2023). Extinct & Endangered: Insects in Peril. ABRAMS. 144 pp.

Ballmer, G., and R. Mattoni. 1998. A fly spec. Fly Times 20: 6-7.

Cazier, M. A. (1985). A revision of the North American flies belonging to the genus Rhaphiomidas (Diptera, Apioceridae). Bulletin American Museum Natural History, 182(2), 183–263. 

Mattoni, R., J. George, R. Rogers, and K. Osborne. (2001). Delhi sands fly update. Fly Times 26: 10-11.

Powell, J. A. (1983). Changes in the insect fauna of a deteriorating riverine sand dune community during 50 years of human exploitation. Report. US Fish and Wildlife Service, Sacramento.

Rogers, Rick and van Dam, Matthew H. (2007). Two new species of Rhaphiomidas (Diptera: Mydidae). Zootaxa 1664: 61-68.

Stone, A., C.W. Sabrosky, W.W. Wirth, et al. 1983. A catalog of the Diptera of America North of Mexico. Smithsonian Institution Press, Washington, DC. 1696 pp.


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