Bregmosina, a new Neotropical genus of Limosininae (Diptera: Sphaeroceridae) Author Marshall, Stephen A. text Zootaxa 2013 3641 3 260 270 journal article 10.11646/zootaxa.3641.3.5 26137e83-060f-42f8-82c9-011d9a86c15b 1175-5326 221272 E5849A06-1F26-47ED-91E4-433A1F57B0BE Key to the species of Bregmosina 1) Lower orbital bristle conspicuously finer and less than half as long as upper orbital bristle. Male sternite 5 made up mostly of two strikingly stout, long posterolateral processes ( Fig. 20 ). Length (antennal base to wing tip) less than 2.3 mm .......... 2 - Both orbital bristles well developed, lower bristle at least half as long as upper ( Fig. 8 ). Male sternite 5 without long posterolateral processes. Length (antennal base to wing tip) over 2.5 mm ................................................. 3 2) Sternite 4 of male with two short posteromedial lobes ( Fig. 20 ). Surstylus strongly recurved, apex long and pointed, much longer than width of surstylus ( Fig. 21 ).............................................. B. obunca . Costa Rica , Guyana - Sternite 4 of male without posteromedial lobes. Surstylus club-like, apex swollen with a short pointed process shorter than width of surstylus ( Fig. 22 )............................................................. B. howdeni . Ecuador 3) Male cercus with ventral point ( Figs. 12 , 23 ). Postgonite either very broad at middle or swollen at apex ( Figs. 14 , 26 ). Either second costal sector longer than third or R2+3 slightly sinuate ( Fig. 10 ). Fore tarsomeres 2–4 and sometimes apex of tarsomere 1 flattened and wider than base of tarsomere 1. Known females with tergite 8 not shortened dorsally, longer than cercus ( Fig. 16 )..................................................................................................... 4 - Male cercus subquadrate, without ventral point ( Fig. 5 ). Postgonite narrow, simple ( Fig. 6 ). R2+3 not distinctly sinuate and second costal sector shorter than third ( Fig. 3 ). Fore tarsomeres 3–4 short and slightly swollen but not distinctly wider than tarsomere 1. Female tergite 8 short dorsally, no longer than cercus ( Fig. 1 ).......................... B. bucki Costa Rica 4) Fore tarsomeres 2–5 short and flat, tarsomere 1 almost parallel sided, not distally swollen ( Fig. 7 ). R2+3 slightly sinuate, curved up at apex ( Fig. 10 ). Eye relatively small, less than 2.5X genal height. Male abdominal sternites 2 and 3 entire................................................................................ B. ephydriformia . Costa Rica , Venezuela - Fore tarsomeres 1–4 strikingly swollen and flattened, tarsus strongly spindle-shaped. R2+3 straight, slightly curved only at apex. Eye larger, over 2.5X genal height. Male with all abdominal sternites medially divided ( Fig. 24 )... B. schizosterna . Ecuador .