A revision of the genera and species of the Neotropical family Mesembrinellidae (Diptera: Oestroidea) Author Whitworth, Terry L. Author Yusseff-Vanegas, Sohath text Zootaxa 2019 2019-08-26 4659 1 1 146 journal article 25918 10.11646/zootaxa.4659.1.1 0cbe0b8e-2019-4f5a-8336-2d4d9fcd8bf6 1175-5326 3377239 57309E14-0330-4ED7-BCDA-355EE6618215 Key to species of Laneella 1 Basal half of tarsal claws pale, white to pale yellowish ( Fig. 10 ); wing with infuscation along costa or tip of wing; male with basal 2/3 of cerci slender in dorsal view, as in Figs 20 , 22 . Female terminalia as in Figs 284–285...................... 2 - Basal half of tarsal claw orange, brown or black ( Fig. 11 ); area along costa with at most faint infuscation, distal portion of wing not infuscated; male with basal 2/3 of cerci much broader in dorsal view in two of three species ( Figs 18 , 24 ). Female terminalia distinctive, as in Figs 282–283, 286....................................................................... 3 2 Wing with anterior edge infuscated from junction of subcosta-costa posteriorly to R 4+5 and distally to tip; palpus brown to black; row of black postocular setae ending about 2/3 of way from top of eye to gena, with pale yellowish below that; anterior half of T4 with solid whitish band of tomentum; fore and mid femora dark reddish-brown, hind femur orange to brown; [known from Brazil and Paraguay ].......................................................................... L. nigripes - Wing with distal 1/2–1/3 of tip infuscated, also cells r 1 , r 2+3 and r 4+5 and junction of vein CuA1 and crossvein dm-cu darkened; palpus orange; row of black postocular setae reaching gena; midsegment of T4 with four transverse pale spots; all femora orange; [known from Brazil , Colombia , Costa Rica and Ecuador ]........................................... L. perisi 3 Thorax and abdomen dark metallic bluish-purple ( Fig. 457 ); base of wing with cells and veins darkened; disc, rims and setae of calypters dark brown; anterior half of basicosta brown, posterior half more or less reddish-brown; [known primarily from western and central Costa Rica ].......................................................... L. purpurea sp. nov. - Thorax brown to reddish-brown, not metallic; base of wing not darkened; calypters with disc, rims and fringe of setae light to moderately brown; basicosta orange...................................................................... 4 4 Wing with distinctive brown spot around crossvein r-m ( Fig. 3 ); abdomen shiny brown or bluish-purple; wing with section IV about 0.25 of section III or less.......................................................................... 5 - Wing without darkened area around crossvein r-m; abdomen shiny metallic blue to purple; wing with section IV about 0.46 of section III; [known from Mexico and Guatemala ]........................................ L. fuscosquamata sp. nov. 5 Abdomen bluish-purple, mid and hind femora with apices dark brown; [known only from Colombia ]........... L. patriciae - Abdomen shiny brown; mid and hind femora with apices orange; [known from Costa Rica , Ecuador and Venezuela ].......................................................................................... L. fusconitida sp. nov.