Stipulosina new genus (Diptera: Sphaeroceridae: Limosininae) from bamboo (Chusquea scandens stipules in Ecuador Author Yau, Tiffany 0000-0001-7458-3462 School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada N 1 G 2 W 1 & tyau @ alumni. uoguelph. ca; https: // orcid. org / 0000 - 0001 - 7458 - 3462 tyau@alumni.uoguelph.ca Author Marshall, Stephen A. 0000-0002-5732-9718 School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada N 1 G 2 W 1 & samarsha @ uoguelph. ca; https: // orcid. org / 0000 - 0002 - 5732 - 9718 samarsha@uoguelph.ca text Zootaxa 2021 2021-11-30 5072 3 255 277 journal article 3172 10.11646/zootaxa.5072.3.3 7bf37798-7886-4f3a-a043-d35b52ffaa20 1175-5326 5744607 DCD4C7AD-EEAE-461E-B215-471E058F0F4D Key to the species of Stipulosina 1) Eye height less than 3× genal height ( Fig. 15c ). Hind tibia with some enlarged dorsal setae on distal half; hind femur similar in color to hind tibia and weakly swollen, about twice the diameter of the tibia ( Fig. 15a ). Surstylus with a single long curved lobe with three stout preapical setae ( Fig. 16a )................ Stipulosina curvistylus new species , known only from one male . - Eye height greater than 4× genal height ( Figs. 6c , 9c , 12c ). Hind tibia with only uniformly small dorsal setae; hind femur darker than hind tibia and conspicuously swollen, at least 3× the diameter of the hind tibia ( Figs. 6a , 9a , 12a ). Surstylus either broad and densely setose ( Figs. 7a , 10a ) or slender and deeply bifid ( Fig. 13a ), never curved with stout preapical setae.......... 2 2) Proximal posterodorsal mid tibial seta small, 0.6× the length of anterodorsal seta at same level ( Fig. 12e ). Cercus reduced to posteroventral corner of epandrium but with conspicuously thick setae ( Figs 13a, c ). Subepandrial plate broad, triangular or T-shaped ( Fig. 13c ). Surstylus deeply cleft, U-shaped ( Fig. 13d ), with two long, narrow, sparsely setose ventral lobes............................................................................. Stipulosina ceroptistylus new species . - Proximal posterodorsal mid tibial seta large, 0.75× the length of anterodorsal seta at same level ( Figs. 6e , 9e ). Cercus separate, elongate and setose ( Figs. 7c , 10d ). Subepandrial plate somewhat X-shaped ( Figs. 7c , 10d ). Surstylus bilobed but not deeply cleft, but, densely setose at apices ( Figs. 7a, b , 10a, b )........................................................ 3 3) Male cercus longer than surstylus, setae at apex of cercus much longer than surstylar setae ( Fig. 7a ). Lateral margins of female T8 dilated, conspicuously longer than dorsal part of sclerite ( Fig. 9c )............... Stipulosina amphibarba new species . - Male surstylus longer than cercus, setae on ventral margin of surstylus longer than setae on cercus ( Figs. 10a, e ). Lateral margins of female T8 only slightly dilated, not conspicuously longer than dorsal part of sclerite ( Fig. 11c )...................................................................................... Stipulosina barbistylus new species .