New species of the stingless bee genus Plebeia (Hymenoptera: Apidae) Author Engel, Michael S. Division of Entomology, Natural History Museum, and Department of Ecology & Evolutionary Biology, 1501 Crestline Drive - Suite 140, University of Kansas, Lawrence, Kansas 66045 - 4415, USA (msengel @ ku. edu). & Division of Invertebrate Zoölogy, American Museum of Natural History, Central Park West at 79 Street, New York, New York 10024 - 5192, USA. text Journal of Melittology 2022 2022-10-01 2022 114 1 28 http://dx.doi.org/10.17161/jom.i114.18568 journal article 10.17161/jom.i114.18568 2325-4467 13228507 urn:lsid:zoobank.org:pub:262EEB45-553C-4C56-85F1-093A2ED4BA3E Plebeia ( Plebeia ) roubiki Engel , new species ZooBank: urn:lsid:zoobank.org:act: BA4341FF-51AE-47C0-8F12-DF82CACB046A ( Figs. 11–15 ) DIAGNOSIS: This species is superficially similar to P. deceptrix ( vide supra ) but differs by the more extensive facial and mesosomal maculation ( Figs. 12, 13 ), the shorter malar space (at most 0.25× flagellar diameter), and the narrower clypeus (width 1.7–1.8× length). DESCRIPTION: As described for P. deceptrix ( vide supra ), with the following modifications: ⚲: Total body length approximately 3.83–4.67 mm , forewing length (to base of humeral sclerite) 3.50–4.08 mm . Head wider than long, width 1.53–1.67 mm , length 1.20–1.40 mm ; compound eye length 1.03–1.17 mm ; upper interorbital distance 0.90– 0.97 mm , lower interorbital distance 0.77–0.87 mm . Scape length 0.53–0.57 mm . Malar area 0.25× flagellar diameter; clypeus broad, width 1.7–1.8× length. Preoccipital ridge carinate. Intertegular distance 0.93–1.03 mm . Hind wing with 5 distal hamuli. Integument of head and mesosoma largely black to dark reddish brown; clypeus light yellow to yellow except sometimes with basolateral areas of light brown to brown bordering anterior tentorial pits and often light brown along apical margin; supraclypeal area light yellow to yellow; scape yellow to yellowish brown, sometimes with some brown on dorsal apical surface, pedicel brown, flagellomere I brown, sometimes a bit lighter ventrally, remainder of flagellum brown to dark brown; lower paraocular area largely light yellow to yellow except black to reddish brown bordering antennal toruli ventrally to anterior tentorial pit, yellow then tapering in width upward to a point slightly above upper tangent of concavity in ocular border, remainder of face black; vertex and upper gena black, lower half of gena and postgena yellowish brown to orange. Pronotum light yellowish brown to orange and pale yellow on pronotal lobe; propleura yellow; mesoscutum black with stripes of pale yellow along lateral borders; mesoscutellum yellowish brown to orange with pale yellow along apical margin, sometimes narrower or even faintly interrupted medioapically; metanotum black; pleura yellowish brown to orange except blending to brown to dark brown (nearly black in some individuals) ventrally; propodeum yellowish brown to orange laterally and posteriorly, basal area brown to light brown; legs largely yellow except blending toward light brown apically on metatibia and much of prolateral surface of metabasitarsus; wing membranes hyaline and faintly infumate, particularly apically, veins brown to light brown; metasoma yellow to orange. Lower and upper face with minute punctures separated by 2–5× puncture width, integument between punctures smooth and shining; vertex with punctures somewhat larger, more irregular, and separated by about a puncture width, gena as on upper face except punctures slightly denser. Mesoscutum smooth, shining, with minute setiferous punctures separated by 1–3× a puncture width, punctures somewhat more spaced along anterior and posterior borders; punctures of mesoscutellum larger, shallower, and sparse, integument otherwise smooth and shining. Metasoma impunctate and shining, tergum I smooth, remaining terga smooth except faintly imbricate in apical marginal zones; sterna largely faintly and finely imbricate. Setae and bristles of legs largely simple and yellow except tawny on retrolateral surface of metabasitarsus; penicillum, inferior parapenicillum, and rastellum yellow. Setae of metasomal terga rather sparse, tergum I glabrous, remaining terga largely glabrous with suberect, simple setae scatered on apical marginal zones, such setae more numerous on more distal terga. ♀ : Latet . ♂ : Latet . HOLOTYPE : ⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 3-IV–4-V 1994 [ 3 April–4 May 1994 ], Hibbs, ex: malaise ( SEMC ). PARATYPES (18⚲⚲): 1⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 4–14-III 1994 [ 3–14 March 1994 ], Hibbs , ex: malaise ( SEMC ) ; 1⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 14–24-III 1994 [ 14–24 March 1994 ], Hibbs , ex: malaise ( SEMC ) ; 1⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 24-III–3- VI 1994 [ 24 March–3 April 1994 ], Hibbs , ex: malaise ( SEMC ) ; 1⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 3-IV–4- V 1994 [ 3 April–4 May 1994 ], Hibbs , ex: malaise ( SEMC ) ; 2⚲⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 13–23- VI 1994 [ 13–23 June 1994 ], Hibbs , ex: malaise ( SEMC ) ; 4⚲⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 23-IV–3-VII 1994 [ 23 June–3 July 1994 ], Hibbs , ex: malaise ( SEMC ) ; 1⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 25VII–3VIII 1994 [ 25 July–3 August 1994 ], Hibbs , ex: malaise ( SEMC ) ; 1⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 3–16-VIII 1994 [ 3–16 August 1994 ], Hibbs , ex: malaise ( SEMC ) ; 2⚲⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 27VIII–10XI 1994 [ 27 August–10 November 1994 ], Hibbs , ex: malaise ( SEMC ) ; 2⚲⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 10–21-X 1994 [ 10–21 October 1994 ], Hibbs , ex: malaise ( SEMC ) ; 1⚲, Ecuador : Sucumbios , Sacha Lodge , 0.5°S , 76.5°W , 270 m , 1–31- XII 1994 [ 1–31 December 1994 ], Hibbs , ex: malaise ( SEMC ) ; 1⚲, Ecuador : Napo Prov. , Puerto Misahualli , 350 m , II-1983 , Sharkey ( SEMC ) . Figures 14–15. Worker of Plebeia ( Plebeia ) roubiki , new species . 14. Detail of head and mesosomal dorsum. 15. Prolateral surfaces of metatibia and metatarsus. NON-TYPE MATERIAL: 2⚲⚲, Brasil : Rio Trairão , PA , 50 km NE Gradaús , SB-22, 51°49’W , 7°21’S , 21, 24-vii-79 [21, 24 July 1979 ], Mazucato ( SEMC ) . ETYMOLOGY: The specific epithet honors David W. Roubik, in recognition of his extensive work on bee ecology, conservation, and evolution, particularly that of Meliponini.