A revision of the North American flies belonging to the genus Apiocera (Diptera, Apioceridae)By Mont A. Cazier
An excellent and detailed reference for this fascinating family of flies.
There is also a 1985 companion/addendum publication by Cazier from the American Museum of Natural History entitled:
"New species and notes on flies belonging to the genus Apiocera (Diptera, Apioceridae)", American Museum Novitates, no. 2837, pp. 1-28.
It treats an additional 5 new NA species (A. mulegeae, warneri, varia, constricta
, and lavignei
), has revised keys for the entire genus, and also includes descriptions of previously unknown females of the species augur, alleni, exta
, and voragocolis
. The 1985 publication is available as a PDF from this web page