Description published
Psyche VOI. 94: 51-56
Location of type
Holotype: U.S. National Museum (Washington, DC); Paratypes: British Museum (London), Museum National d'Histoire Naturelle (Paris), Natur-Museum Senckenberg (Frankfurt), Zoological Institute (Leningrad), E. Asensio, and the Bee Biology and Systematics Laboratory.
Description
Male. Length, 5 mm (3.5-5 mm); forewing length, 2.5 rnm (2-2.5 mm). Black except: eyes, tegula, distal tarsal segments, sterna III, IV brown; tergum VII, sterna V-VIII yellowish; posterior margin of sternum I hyaline. Wings hyaline, venation black except costa brown. Pubescence white except off-white on clypeus, interantennal area, vertex, scutum, scutellum; dense on lower half of face, dorsal pronotal angle, scutellum; distinct apical fasciae laterally on terga I,11, nearly complete on tergum 111, faint on tergum IV. Head as long as broad; interocellar distance less than ocellocular distance, slightly greater than ocelloccipital distance; length of median flagellomeres one and one-half times width, clypeus slightly convex in profile, margin crenulate; mandible bidentate, upper tooth slightly acute; labrum slightly convex on apical margin, surface impunctate medially, sparsely haired; mouthparts in repose reaching past base of forelegs; scutellum slightly convex; rnetano turn oblique in profile; basal area of propodeum sloping, with fine longitudinal carinules; forebasitarsus linear, without acute apical angle; foretarsomere I1 not greatly expanded, longer than wide; tergum VI basolaterally with long, narrow, poorly sclerotized lobe hidden in normal view, apical margin with slight median lobe, lateral corner rounded; tergum VI hidden; sternum I with margin roundly convex (Fig. I), surface under margin covered with dense, velvety pubescence; sternum 1 depressed medially, covered with dense, velvety pubescence where normally covered by sternum I, apical margin of sternum I1 narrowly, shallowly incurved laterally, widely, shallowly incurved medially, margin with long fringe of medially-directed hair; sternum I1 depressed, laterally bordered by narrow hyaline flange, apical margin narrowly hyaline with long fringe of medially curving hair interior to shallow lateral notch; disk of sternum IV sparsely pubescent, margin broadly convex with sharp lateral notch, submedially with small tuft of hair directed obliquely toward middle; sternum V as in Fig. 2; sternum VI as in Fig. 3; sternum VIII rounded apically; genitalia as in Fig. 4.
Female. Length, 4.5-5 mm; forewing length, 2.5-3 mm. Color as in male except: posterior margins ofterga 11,111, sometimes I, sterna I-V brown; mandible subapically reddish. Pubescence white; dense on lower paraocular area, dorsal pronotal angle, tip of pronotal lobe, posterior half of scutellum, metanotum medially, propodeum dorsolaterally; apical fasciae present on terga 1-111, fascia on tergum I thick, broadly interrupted, becoming progressively thinner, less interrupted on terga 11, 111 until thin, complete, sometimes indistinct on tergum IV; scopa white. Head slightly longer than broad; distances on vertex as in male; length of flagellomere V less than width, flagellomeres VI-IX as long as wide; clypeus slightly convex in lateral view, margin slightly crenulate; mandible slender, not elongate, tridentate, distance between apices of lower and middle teeth slightly less than distance between apices of middle and upper teeth, acetabular carina reaching apical half of mandible, acetabular interspace finely, densely punctate, without ridges or shiny areas, basal portion of outer ridge curved dorsally, not reaching acetabular carina; labrum not elongate, not thickened apically, with strong medial tuft arising just basad of apical margin; mouthparts without modified hairs, maxillary palpi four-segmented; gena as wide as eye, ventrally with few long rnesally curved hairs; hypostomal carina low, evenly raised throughout; thorax as in male; foretarsomere I1 as wide as long,
asymmetrical, anteroapical angle slightly acute; sternum I without sharp transverse subapical carina.