Black-tie dress code: two new species of the genus Toxomerus (Diptera, Syrphidae) Author Mengual, Ximo text ZooKeys 2011 140 1 26 http://dx.doi.org/10.3897/zookeys.140.1930 journal article http://dx.doi.org/10.3897/zookeys.140.1930 1313-2970-140-1 Toxomerus anthrax (Schiner) Figures 1529 Mesogramma anthrax Schiner 1868 : 350. Type Locality: South America [ST 3♂, 3♀, NMW]. Mesogramma vitrescens Hull 1930 : 142. Type locality: Colombia, Magdalena, Aracataca [HT ♂, ANSP]. Mesogramma anthrax var. flammaria Hull 1943 : 27. Type locality: Honduras, Puerto Castilla [HT ♂, unknown]. Differential diagnosis. Male and female with medial black facial vitta, but in males does not continue laterad or dorsad antennal bases. Scutum black laterally except pos tpronotum yellow and notopleuron sometimes with a small yellow vitta sublaterally, not on the most lateral margin. Wing extensivey microtrichose with small bare area on both sides of vein M on the basal portion of cell bm, and costal cell bare very basally or along vein SC (posterior margin). Abdomen black, terga 3-5 sometimes dark brown to yellowish-orange, with or without yellow lateral margins; shiny, without pollinose markings. Toxomerus anthrax is similar to Toxomerus circumcinctus but the last has the notopleuron entirely yellow and postalar callus yellowish and the scutellum black with a well-defined broad yellow margin. Male genitalia are different. Length (5): body, 6.0-7.2 (6.6) mm; wing, 4.8-5.5 (5.2) mm. Distribution. Costa Rica, Venezuela, Colombia, Ecuador, Guyana*, Peru*. Material examined. 2♂ syntypes, 28♂ 17♀. Figures 1-15. 1-8 Toxomerus dispar : 1 Abdomen of pale male, dorsal 2 Abdomen of dark male, dorsal 3 Abdomen of very dark male, dorsal 4 Abdomen of dark female, dorsal 5 Abdomen of very dark male, dorsal 6 wing 7 Female genitalia: a dorsal, b ventral 8 Male genitalia, 9th tergum and associated structures: a dorsal b lateral 9 Toxomerus nitidus , abdomen of female, dorsal 10 Toxomerus flaviplurus , abdomen of female, dorsal 11 Toxomerus hieroglyphicus , abdomen of male, dorsal 12 Toxomerus laenas , abdomen of male, dorsal 13 Toxomerus sp. 1, thorax, lateral 14 Toxomerus flaviplurus , thorax, lateral 15 Toxomerus anthrax , thorax, lateral (Figs 1, 2, 4, 6, 7 and 8 from Thompson 1981 ; Figs 9-15 from Hull 1943 ). Figures 16-29. 16 Toxomerus picudus , lateral 17 Toxomerus picudus , dorsal 18 Toxomerus hauseri , lateral 19 Toxomerus hauseri , dorsal 20 Toxomerus hauseri , head, frontal 21 Toxomerus picudus , head, frontal 22 Toxomerus hieroglyphicus , head, lateral 23 Toxomerus picudus , head, lateral 24 Toxomerus nitidus , thorax, lateral 25 Toxomerus laenas , thorax, lateral 26 Toxomerus paragrammus , abdomen, dorsal 27 Toxomerus incaicus , abdomen, dorsal 28 Toxomerus circumcinctus , male genitalia, 9th tergum and associated structures: a dorsal b lateral 29 Toxomerus anthrax , male genitalia, 9th tergum and associated structures: a dorsal b lateral.