. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BRUES AND MELANDER: CLASSIFICATION OF INSECTS 473 Horntails. (Tremex, cosmop.; Sirex, Urocerus, Xeris, hol- arc). (Fig. 890). (UROCERIDjE) SIRICID-ffi 8. Posterior margin of the pronotum straight or nearly so; mesono- tum very short, never extending much behind the anterior mar- gins of the tegulae. (Megalodontes, palsearc). MEGALODONTID-ffi Posterior margin of the pronotum strongly curved, mesonotum longer, extending well behind the anterior margin of the teg- ulse 9. 887. 888. 889. 890 891 Figs. 887-892. Hymenoptera
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BRUES AND MELANDER: CLASSIFICATION OF INSECTS 473 Horntails. (Tremex, cosmop.; Sirex, Urocerus, Xeris, hol- arc). (Fig. 890). (UROCERIDjE) SIRICID-ffi 8. Posterior margin of the pronotum straight or nearly so; mesono- tum very short, never extending much behind the anterior mar- gins of the tegulae. (Megalodontes, palsearc). MEGALODONTID-ffi Posterior margin of the pronotum strongly curved, mesonotum longer, extending well behind the anterior margin of the teg- ulse 9. 887. 888. 889. 890 891 Figs. 887-892. Hymenoptera Cladius (Chittenden) Tenthredinidae. Cephus (Marlatt) Cephidse. Dolerus, wings: M, median cell; Rl, R2, marginal or radial cells; Cl, C2, cubital or submarginal cells; Dl, D2, D3, first, second and third dis- coidal cells; SM, submedian cell; Bl, B2, B3, basal cells. Tenthredinidae. Tremex, wings. Uroceridae. Chlorion, lateral view of thorax and abdomen (Fernald) Sphecidae. 892. Xyela, fore wing. Lettering as in fig. 889; Co, costal cell; A, A, anal cells (MacGillivray) Xyelidse. 9. Antennae clavate; transverse median and basal veins interstitial; abdomen more or less swollen or globose 10 Antennae not clavate; filiform, serrate, or pectinate. .. 11 10. Radial cell divided by a crossvein (Fig. 889); abdomen angled laterally so that the tergites are sharply divided into a dorsal and ventral surface; abdomen of female strongly globose. (Cimbex, Trichiosoma, holarc.) CIMBICID^J Radial cell not divided; abdomen rounded laterally, not angled. 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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