. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CLASSIFICATION OF INSECTS 655 Mesopleura without such a furrow, the prepectus not separated; hind femora with a projection below at apex. (Figs. 952, 954). (Cerceris, cosmop.; Eucerceris, Am.) CERCERIDiE 140. Hind femora produced below at apex as a flattened tubercle which overlaps the base of the tibia; abdomen sessile. (Alysson, Holarc, Neotrop.; Bothynostethus, Am.; Scapheutes, S. Am.). Hind femora simple at apex, without projection 141 141. Marginal cell not appendiculate and mandibles without an emar-
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CLASSIFICATION OF INSECTS 655 Mesopleura without such a furrow, the prepectus not separated; hind femora with a projection below at apex. (Figs. 952, 954). (Cerceris, cosmop.; Eucerceris, Am.) CERCERIDiE 140. Hind femora produced below at apex as a flattened tubercle which overlaps the base of the tibia; abdomen sessile. (Alysson, Holarc, Neotrop.; Bothynostethus, Am.; Scapheutes, S. Am.). Hind femora simple at apex, without projection 141 141. Marginal cell not appendiculate and mandibles without an emar- gination externally; one, two, or three submarginal cells; eyes not emarginate on the inner edge. (Stigmus, Psen, Mimesa, widespr.; Pemphredon, Passalcecus, Holarc). (Including M1MESID/E and PSSNIDrf) PEMPHREDONIDiE Marginal cell appendiculate, or if not, the mandibles are emargi- nate externally 142. 965 Figs. 961-965. Hymenoptera 961. Apis, head, at, antenna; md, mandible; Im, labrum; mx, maxillary palpus; Ip, labial palpus; lb, labium. (Cheshire) Apidae. 962. Head of long-tongued bee (Cockerell). 963. Apis, hind leg of worker (Smith) Apidae. 964. 965. Hind legs of bees (Riley). 142. Second cubital cell present and not petiolate above; upper ocelli usually aborted or deformed. (Figs. 955, 958, 960). (Tachytes, Larra, Tachysphex, cosmop.; Palarus, Lyroda, widespr.; Dinetus, Eur.; Sericophorus, Austr.) LARRIDiE Second cubital cell petiolate, or rarely absent; three perfectly formed ocelli; small species. (Miscophus, widespr.; Plenoculus, N. Am.). (NITZL1D&) MISC6PHID^E 143. Postscutellum with two scale-like processes which project back;. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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