Mischocyttarus kallindusfloren Borges & Silveira sp. nov. (Figs 12, 18, 26) Diagnosis. Female. Wing lenght 9.5–10.0 mm. Gena very narrow, occipital carina well developed but its lower element hardly visible in lateral view; apex of clypeus narrowly truncate; humeral lobes large, projecting laterally and forwards and with lateral lower extremity reflexed, rather detached from pronotum profile as seen from above (Fig. 26); propodeal median furrow wide and shallow, with anterior extremity round; mid and hind tarsi with asymmetrical tarsal claws, with apex narrowly round; first metasomal segment short for this group (Fig. 12), with sides beginning to diverge just before the spiracles, the latter slightly prominent; mesoscutum sculpture dense, puncture diameter varying between rather narrow limits but with scattered clearly larger punctures, interstices rather dull; overall color yellow, with black or brown to testaceous marks, large black mark on vertex touching eyes narrowly, upper mesepisternal plate and scrobe yellow, without any moderate dark marks. Description. Female. Fore wing length 9.5–10.0 mm. Head higher than wide in frontal view (Fig. 18), FHH/IntOW 1.14; clypeus distinctly higher than wide H/WCLP 1.24, apex narrowly truncate; malar space nearly obsolete; tentorial pit much closer to eye margin than to antennal socket; antenna moderately elongated L/Wesc 2.8; posterior occeli widely separated; POL equal to two diameters; POL/OOL 1,55; occipital carina well developed, distinct in lateral view and ending fairly below the level of ocular sinus, margin outwards in relation to margin of pre-foraminal concavity; gena very narrow, occipital carina well developed but practically unnoticed in lateral view; posterior portion of the head, around occipital foramen considerably depressed so that posterior-lateral contour of head as seen from above runs rather abruptly inwards; pronotum without lateral fovea; anterior margin of pronotum with lamella raised and reflexed on central portion, with lateral profile as a loop reaching more than 180 degrees; region immediately behind the lamella without secondary margin; humeral angle well developed WCAR/WMS 1.18; pronotal carina high, but distinctly lowered at center, forming large lateral lobes with extremities reflexed, detached from the general profile of pronotum (Fig. 26); mesoscutum about as long as wide, L/WMS 1.04; fore wing moderately elongated, LDIS/HMP 2.44; mid and hind tarsi with asymmetrical claws, with apex round; propodeum with median furrow wide and shallow, with anterior extremity round; propodeal valve low and oblique, distinctly angular below with lamella wider at middle; first metasomal segment short for this species-group (Fig. 12), LSI/HMP 1.22; L/WSI 4.0; with sides beginning to diverge just before the spiracles, the latter slightly prominent. Sculpture. Moderately strong and conspicuous. Disk of clypeus with weak medium-sized punctures and nearly indistinguishable micropunctures, area close to ventral margin smooth, with medium-sized shallow punctures (0.04–0.06mm); upper interantennal area, frons and vertex with close dense punctures of generally small diameter, with still smaller punctures surrounding ocelli; mesoscutum sculpture dense, comb-like, puncture diameter varying continuously between rather narrow limits (0.04–0.06mm), but also with few isolated distinctly larger punctures (0.09mm), interstices rather dull, area close to margins with smaller punctures; humeral region similar to mesoscutum, diameter slightly larger; mesopleuron with not so dense fine punctures (0.02–0.04mm), and also more scattered larger ones (0.05–0.07mm), interstices shining; metapleuron with punctures smaller and more sparse; propodeum with punctures larger (up to 0.09mm) and more sparse, central area with punctures larger and more sparse, integument more shining; furrow distinctly striate without a keel. Vestiture. Eyes with very short inconspicuous hairs; head, thorax and mesosoma with conspicuous appressed hairs; longer and stouter hairs on lower portion of clypeus, frons, vertex, pronotum and mesopleuron (whitish ventrally); those on mesoscutum a little shorter; hairs on metapleuron, and propodeum more erect, finer and longer; metasomal sternum 1 distinctly polished, with long fine erect hairs; such long hairs also on base of tergum 1 before spiracles, also with appressed shorter hairs on this entire tergum and on remaining metasomal terga and sterna; more erect longer hairs near margin of sterna and on external surface of glandular areas of sterna 5 and 6; hairs on disk of sternum 2 very long, similar to those on sternum 1; legs generally with appressed hairs. Color. Yellow; antenna above; posterior lateral stripes on mid and hind coxae (larger); most of mid and hind trochanters; anterior and posterior elongated marks on mid and hind femora (joining at base); elongated mark on inner surface of mid tibia and most of hind tibia; hind tarsus; large distal mark on first metasomal tergum; discal area of terga 2–6 (darkening posteriorly) brown to dark brown; subtriangular mark on vertex, touching the eyes narrowly at two points and joining behind to an occipital band separated from eyes; area around foraminal orifice; narrow mark on the anterior face of pronotum; humeral stripe; mesoscutum (except for two elongated submedian yellow stripes); margins and sulci of mesopleuron; posterior third of scutellum and central line; posterior margin of metanotum (broader medially), marks on meso and meta-axillae; propodeum lateral margin narrowly; T-shaped mark on propodeum (anterior margin and median furrow) with small triangles on lateral extremities, black. Wings hyaline with brown veins. Male. Unknown. Nest. A small nest of this species has been examined with twelve cells at different stages of development (MPEG collection). The nest is made of small chips of wood of light brown color. The pedicel is lacking, but it was positioned at one extremity of the comb, at an angle of ca. 90 degrees, which suggests that it was on the adaxial surface of a leaf, as is common in other species of Omega. Etymology. The specific epithet is a reference made to the computational goddess Kalinda of the flowers, created by the mathematician David Zindell in his book Neverness. Geographic distribution. BRAZIL: Para: Serra dos Carajás. (see Fig. 34). Remarks. This species has large and prominent pronotal humeral lobes. It also can be recognized by the very narrow gena, the V-shaped distal dark mark on metasomal tergum 1, and by the short first metasomal segment. Examined material. BRAZIL: HOLOTYPE ♀ Pará (with nest), Serra dos Carajás, Serra Norte, Serraria, 15.vi.1985 (R. D. Thomaz) (MPEG); PARATYPE 1♀ (same locality and data).

Published as part of Borges, Rafael Cabral & Silveira, Orlando Tobias, 2019, Revision of the species-group of Mischocyttarus (Omega) filiformis (de Saussure 1854), with description of three new species (Hymenoptera, Vespidae), pp. 545-564 in Zootaxa 4657 (3) on pages 561-563, DOI: 10.11646/zootaxa.4657.3.7, http://zenodo.org/record/3998493