China: key to genera (in Mandarin) on page 284 of Yang, Yao, & Cui, 2012: “Bombyliidae of China." Contact me
All: key to subgenera in Evenhuis, 1979: “Studies in Pacific Bombyliidae (Diptera). II. Revision of the genus Geron of Australia and the Pacific." Link
Australasia: key to species in Evenhuis, 1979: “Studies in Pacific Bombyliidae (Diptera). II. Revision of the genus Geron of Australia and the Pacific." Link
Nearctic: key to species of Geron (Geron) in Hall & Evenhuis, 2003: “Review of the subgenus Geron (Geron) Meigen in the Nearctic Region (Diptera: Bombyliidae: Toxophorinae)." Link
Africa (southern): three keys to species: one for Geron sensu Hesse, one for Amictogeron (now a synonym), and one for Pseudoammictus (now a subgenus) on pages 873, 921, and 958 respectively of Hesse, 1938: “A revision of the Bombyliidae (Diptera) of Southern Africa, Part I." Link
Individuals should first be identified to one of the three genera using the key at the front of the book.
Canada (eastern): key to species in Kits, Marshall, & Evenhuis, 2008: “The bee flies (Diptera: Bombyliidae) of Ontario, with a key to the species of eastern Canada." Link
China: key to species (in Mandarin) on page 285 of Yang, Yao, & Cui, 2012: “Bombyliidae of China." Contact me
Chile: key to species in Hall, 1975: “The Bombyliidae of Chile." Contact me
Africa: key to species in Bowden, 1967: “Studies in African Bombyliidae. VI. A provisional classification of the Ethiopian Systropinae with descriptions of new and little known species." Link
Australia: key to species in Yeates & Hagen, 1988: “Revision of the Australian Species of Systropus Wiedemann (Diptera: Bombyliidae)." Link
China: key to species in Cui & Yang, 2010: “Two new species and two new synonyms of Systropus Wiedemann, 1820 from Palaearctic China (Diptera: Bombyliidae)." Link
All: key to species in Evenhuis, 1979: “Studies in Pacific Bombyliidae (Diptera). I. A new species of Zaclava from the loyalty Islands and New Caledonia, with a key species in the genus." Link
Nearctic/Neotropical: key to species in Cunha, Lamas, & Couri, 2011: “Taxonomic notes, new species and identification key to the New World species of Toxophora Meigen (Diptera, Bombyliidae, Toxophorinae)." Link
Africa (southern): key to species in Hesse, 1963: “New Species of Crocidium and Toxophora (Bombyliidae)." Link
Ghana: key to species on page 53 of Bowden, 1964: “The Bombyliidae of Ghana." Contact me