. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BRUES AND MELANDER: CLASSIFICATION OF INSECTS 375 32. Antennal sheaths very stout, not over twice as long as their basal breadth; face with a small sharp protuberance on each side a little mesad of the vertical line of apices of antennae and slightly above middle of face, and at the base of each are two short hairs on their inner side; two very strong postspiracular abdominal bristles on each segment. (Fig. 752, Coenomyia). CCENOMYIIDiE. Figs. 751-759. Orthorrhaphous Diptera, Pupae 751. Mydas, side view (Greene) Mydai
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BRUES AND MELANDER: CLASSIFICATION OF INSECTS 375 32. Antennal sheaths very stout, not over twice as long as their basal breadth; face with a small sharp protuberance on each side a little mesad of the vertical line of apices of antennae and slightly above middle of face, and at the base of each are two short hairs on their inner side; two very strong postspiracular abdominal bristles on each segment. (Fig. 752, Coenomyia). CCENOMYIIDiE. Figs. 751-759. Orthorrhaphous Diptera, Pupae 751. Mydas, side view (Greene) Mydaidae. 752. Coenomyia, dorsal view (Greene) Ccenomyiidse. 753. Rhachicerus, dorsal view (Greene) Xylomyiidse. 754. Xylophagfus, dorsal view (Greene) Xylophagidae. 755. Psilocephala, dorsal view (Malloch) Therevidae. 756. Dasyllis, dorsal view (Greene) Asilidae. 757. Chrysopila, side view (Malloch) Rhagionidse. 758. Sparnopolius, side view (Malloch) Bombyliidse. 759. Rhamphomyia, side view (Malloch) Empididse. 33. Antennal sheaths distinctly annulated, slender, about four times as long as their basal breadth; face without protuberances; post- spiracular abdominal bristles slender, eight to ten on each segment. (Fig. 754, Xylophagus) Head without strong thorns; abdomen with three or four distinct pairs of spiracles and without spinose armature. ACROCERATIDiE. 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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