Discovery of the Bee Tribe Tarsaliini in Arabia (Hymenoptera: Apidae), with the Description of a New Species Author Engel, Michael S. Abdulaziz S. Alqarni, & Division of Invertebrate Zoology (Entomology), American Museum of Natural History; Division of Entomology, Natural History Museum, and Department of Ecology & Evolutionary Biology, University of Kansas, Lawrence. & Department of Plant Protection, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia. & Department of Plant Protection, College of Food and Agriculture Sciences, King Saud University, Riyadh, Author Michener, Charles D. Author Boontop, Yuvarin text American Museum Novitates 2017 2017-03-20 2017 3877 1 28 http://www.bioone.org/doi/10.1206/3886.1 journal article 5847 10.1206/3877.1 30867afc-5ebd-4c4e-a008-1a7f423b8b81 0003-0082 4598486 Key to Species of Astibomelissa 1.Mesoscutum with numerous appressed to decumbent, plumose setae (usually missing on central disc, presumably due to abrasion), setae longer, not squamiform; outer surface of probasitarsus with fine, erect to suberect setae with distinctly sinuate or wavy apices (= type IV of Pasteels and Pasteels, 1974 ); inner setae of metabasitarsus white to pale yellow and similar to setae of scopa; metasomal tergum I without transverse carina at angle of anterior- and dorsal-facing surfaces; smaller species, 5.5–7.5 mm in total length ( Saudi Arabia ; northeastern Africa ).................................................... 2 —Mesoscutum tomentose, with dense covering of appressed, minute (typically about 0.50× ocellar diameter), squamiform setae; outer surface of probasitarsus with fine, subdecumbent setae tapering to straight apices; inner setae of metabasitarsus fuscous, contrasting with surrounding white to pale yellow setae of scopa; metasomal tergum I with transverse carina at angle of anterior- and dorsal-facing surfaces; larger species, 7.9–8.8 mm in length [ Iran ]............................................... T . persica (Warncke) 2.Female with yellow facial maculation confined to labrum, clypeus, and supraclypeal area (fig. 3C); metasomal scopa dense, with setae greatly elongate and subdecumbent to suberect; small species, approximately 5.5–6.5 mm in length (male unknown) [ Egypt , Sudan ].................................................... T . mimetes (Cockerell) —Female with yellow facial maculation extending to paraocular area and scape (fig. 6C); metasomal scopa not so dense, with setae long and largely decumbent to subdecumbent; moderate-sized species, approximately 6.7–7.5 mm in length (central Saudi Arabia )........................................................... T . kindahensis Engel, n. sp.