A conspectus of the flower fly genus Allograpta (Diptera: Syrphidae) with description of a new subgenus and species Author Mengual, Ximo Author Ruiz, Carlos Author Rojo, Santos Author Ståhls, Gunilla Author Thompson, Christian text Zootaxa 2009 2214 1 28 journal article 10.5281/zenodo.189912 be611bcb-0759-4dc2-b67a-68fc5efa93af 1175-5326 189912 Allograpta ventralis species group Diagnosis. Face straight, with large low tubercle; oral opening about 2 times as long as wide, with oral apex at level of antennal base; antennal pits confluent; plumula absent; subscutellar pile fringe absent; wing broadly bare basomedially, without apical dark macula ; alula narrow, about 1/2 as broad as cell BM; metasternum bare or with 2–3 very short pile; abdomen elongate or slightly petiolate. Included species. AUSTRALIAN: ** dorsalis Miller 1924 : 284 ( Ocyptamus ) New Zealand ; ** ventralis Miller 1921 : 296 ( Sphaerophoria ) New Zealand . The biology of ventralis was described by Bowie (2001) and the species are typical Allograpta predators which feed on mealybugs ( Balanococcus cordylinidis ( Pseudococcidae )). See also Thompson (2008: 4, fig. 4) for colour habitus.