Review of the stiletto fly genus Actenomeros Winterton & Irwin (Diptera, Therevidae, Agapophytinae) Winterton, Shaun L. ZooKeys 2011 120 55 63 NMD http://species-id.net/wiki/Actenomeros Winterton & Irwin, 1999 b Insecta Therevidae Actenomeros CoL Animalia Actenomeros Diptera 2 57 Arthropoda genus  Type species:  Actenomeros corniculaticaudusWinterton & Irwin, 1999b: 280.  Diagnosis. Head sub-spherical; frons grey to gold pubescent; minute, dark setae sometimes present; frons flat to rounded, width sexually dimorphic, male frons narrower, but eyes not contiguous; occiput concave; two-three poorly defined rows of postocular macrosetae, rarely a single row in female; antenna length shorter than head; scape and pedicel short cylindrical, with strong dark setae; flagellum conical, compressed laterally, style terminal; sternopleuron glabrous medially; legs pale yellow, tarsi darkened distally; mid coxa without setae on posterior surface; hind femur with dark, anteroventral setae sub-apically; fore and hind femora without velutum patches; scutal chaetotaxy: np, 3-4; sa, 2; pa, 1; dc, 2-4; sc, 1; wing cell m3 open; abdomen black, male often with extensive abdominal velutum, female often with triangular patches of velutum laterally on segments; male genitalia without velutum patches on ventral surface of gonocoxites; gonocoxite with outer process present, often long, upward directed and horn-like; articulated gonocoxal process greatly reduced or absent; ventral lobe of gonocoxite sometimes greatly enlarged; hypandrium triangular, glabrous, fused to gonocoxites laterally; gonocoxal apodeme relatively short; distiphallus narrow, straight; dorsal apodeme of parameral sheath 'T'-shaped; ejaculatory apodemes relatively small, narrow; ventral apodeme forked; female genitalia with A1 and A2 acanthophorite spines well developed; tergite 8 with narrow process on anterior margin; furca sclerotized in a narrow ring; three spherical spermathecae; spermathecal sac shape trilobate, spermathecal duct arrangement paired, one spermathecal duct joining to each spermathecal sac duct or rarely alternating along common spermathecal sac duct ( Actenomeros intermedia).  Comments.  Winterton et al. (1999b)noted that this genus superficially resembles Nanexilabut is differentiated by 2-3 rows of postocular setae and male genitalic features such as a reduced or absent articulated gonocoxal process and sometimes a large horn-shaped outer process on the gonocoxite. The remaining species in the Nanexila atricostalisspecies-group (i.e. Nanexila atricostalisWinterton & Irwin and Nanexila jimrodmaniWinterton) retained in Nanexilahave a well-formed articulated gonocoxal process and can be distinguished from Actenomerosspecies using the key to Australasian genera in Winterton (2011). The horn-like process on the gonocoxites is only present in Actenomeros corniculaticaudusand Actenomeros onyx.Males are unknown for Actenomeros aureilineatacomb. n.and Actenomeros intermediacomb. n.; females of these two species are described by Winterton et al. (1999b).  Included species.  Actenomeros aureilineata(Winterton & Irwin) comb. n., Actenomeros budawangsp. n., Actenomeros corniculaticaudusWinterton & Irwin, Actenomeros intermedia(Winterton & Irwin) comb. n., Actenomeros onyxWinterton & Irwinand Actenomeros paradoxa(Winterton & Irwin) comb. n.  Key to Actenomerosspecies     Actenomeros aureilineata   Actenomeros intermedia  Fig. 5 F-G  Actenomeros paradoxa  Fig. 5 B-C  Actenomeros budawang   Actenomeros corniculaticaudus   Actenomeros onyx