. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CLASSIFICATION OF INSECTS 653 951). (Chlorion { = Sphex, auctt.), Sceliphron (—Pelopoeus), Sphex (Ammophila), cosmop.; Podalonia).1 SPHECIDvE Abdomen sessile or subsessile, never with a slender, cylindrical petiole 131 131. Labrum free, well-developed, wider than long, triangular or semi- circular, extending beyond the clypeus; sternauli on mesopleura not complete. (Stlzus, Sphecius, cosmop.; Exeirus, Austr.) (EX- ElRIDA?) STtZTDM Labrum short, small, not or scarcely extending beyond the cly- peus. (If the second cubi
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CLASSIFICATION OF INSECTS 653 951). (Chlorion { = Sphex, auctt.), Sceliphron (—Pelopoeus), Sphex (Ammophila), cosmop.; Podalonia).1 SPHECIDvE Abdomen sessile or subsessile, never with a slender, cylindrical petiole 131 131. Labrum free, well-developed, wider than long, triangular or semi- circular, extending beyond the clypeus; sternauli on mesopleura not complete. (Stlzus, Sphecius, cosmop.; Exeirus, Austr.) (EX- ElRIDA?) STtZTDM Labrum short, small, not or scarcely extending beyond the cly- peus. (If the second cubital cell is petiolate and the hind angles of the propodeum are neither acute nor spined, see Exeirus, couplet 131) 132 951 ^-f^~~^ 952 ^**^%r-K^\ 953 954. 957 Figs. 951-960. Hymenoptera 951. Chlorion, wings. Sphecidae. 952. Eucerceris, wings. Cerceridae. 953. Bembix, wings. Bembicidae. 954. Cerceris, wings. Cerceridae. 955. Tachytes, wings. Larridae. 956. Gorytes, wings. Gorytidae. 957. Trypoxylon, front view of head (Kohl) Trypoxylidae. 958. Tachytes, underside of thorax. M, mesosternum; P, its posterior process; C, coxae (Williams) Larridae. 959. Trypoxylon, wings. Trypoxylidae. 960. Niteliopsis, antenna of female (Williams) Larridae. 132. Radial cell broadly truncate at apex and prolonged as a small, weakly defined cell; antennae inserted near the clypeus, very close to the clypeal suture; eyes of male usually very large and con- 1 As with many names for widely known genera of insects there is much dis- agreement concerning the proper application of Sphex, Chlorion and 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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