Stibasoma Schiner, 1867

Stibasoma Schiner, 1867: 93 –94; Lutz, 1915: 100 –103 (transcription of the original description); Kröber, 1932 (key); Fairchild, 1969 (definition, classification); Fairchild, 1971 (catalog); Goodwin & Murdoch, 1974 (larvae), Fairchild & Burger, 1994 (catalog).

Diagnosis. Stibasoma species resemble bees of the genus Centris Fabricius, Bombus Latreille, Xylocopa Latreille and Euglossa Latreille (Lutz 1915) . Species with typically robust and pilose bodies, some bright yellow or orange; eyes bare and unicolored in females, holoptic and bicolored in males; vertex without depression; ocellar tubercle and ocelli indistinct; frons broad; midcallus connected to frontal callus, frontal callus continues as crest; short robust antenna, basal flagellomere of the antenna with long and curved dorsal spine; palpus shorter than proboscis, basally inflated; palpus reduced on males; labellum totally sclerotized, shiny; wings usually patterned, never completely hyaline; cell r4 open, junction of R4+R5 without appendix; tibiae inflated and pilose, fore tibia curved, hind tibia with row of long hairs posterodorsally on face; abdomen robust and strongly convex on both sides.

Species. S. apicimacula Fairchild, 1940, S. aureoguttatum Kröber, 1931, S. bella Limeira-de-Oliveira & Rafael, 2005, S. bicolor Bigot, 1892, S. bifenestratum Philip, 1966, S. chionostigma (Osten Sacken, 1866), S. currani Philip, 1943, S. festivum (Wiedemann, 1828), S. flaviventre (Macquart, 1848), S. fulvohirtum (Wiedemann, 1828), S. giganteum (Lutz, 1913), S. leucopleurale Barretto, 1947, S. lutzi Barretto, 1947, S. manauensis sp. nov., S. panamensis Curran, 1934, S. ruthae sp. nov., S. theotaenia (Wiedemann, 1828), S. willistoni Lutz, 1907 .