. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 626 662?S Figs. 622-628. Pyrgotidae, Pterocallida?, Ulidiidae, Richardiidae, Phytalmiidae 622. Pyrgota, profile of head. Pyrgotidae. 623. Pterocalla, wing (Williston) Pterocallidae. 624. Euxesta, wing. Ulidiidae. 625. Chaetopsis (Cole) Ulidiidae. 626. Coelometopia, wing (Williston) Richardiidae. 627. Phytalmodes, head from front (Bezzi) Phytalmiidae. 628. Phytalmodes, wing (Bezzi) Phytalmiidae. 104. Propleural and usually sternopleural bristles absent, three supra- alar bristles; mouth-opening very large, clypeus larg
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 626 662?S Figs. 622-628. Pyrgotidae, Pterocallida?, Ulidiidae, Richardiidae, Phytalmiidae 622. Pyrgota, profile of head. Pyrgotidae. 623. Pterocalla, wing (Williston) Pterocallidae. 624. Euxesta, wing. Ulidiidae. 625. Chaetopsis (Cole) Ulidiidae. 626. Coelometopia, wing (Williston) Richardiidae. 627. Phytalmodes, head from front (Bezzi) Phytalmiidae. 628. Phytalmodes, wing (Bezzi) Phytalmiidae. 104. Propleural and usually sternopleural bristles absent, three supra- alar bristles; mouth-opening very large, clypeus large, proboscis heavy, palpi broad. A large group, mainly tropical. (Including CEPHALlIDA?) PLATYSTOMATIM: a. Upper occiput usually convex; abdomen stalked, elongate; basal cells of wing diminutive; sternopleurals usually present; ant-like species. (Myrmecomyia, Delphinia, Myrmecothea, Tritoxa). MYRMECOMYIINLE Upper occiput never convex; abdomen not ant-like, if elongate no sternopleurals present; basal cells not small b b. Epistome convexly projecting above oral margin. (Traphera, Lule, Piara, Xiria) TRAPHERIN^ Epistome not convexly projecting , c. 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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