. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 372 bulletin: museum of comparative zoology 14. Apical abdominal segment terminating in two or four paddle-like or fin-shaped organs which are fringed on all or part of outer surface by strap-like hairs; or if the apical segment terminates in two long subconic processes the tarsi are recurved against the ventral surface of the base of the abdomen and apex of thorax so that they do not extend beyond apices of wings 15 Apical segment of abdomen obtuse, armed with short or elongate spines or thorns, or if ending in a pai
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 372 bulletin: museum of comparative zoology 14. Apical abdominal segment terminating in two or four paddle-like or fin-shaped organs which are fringed on all or part of outer surface by strap-like hairs; or if the apical segment terminates in two long subconic processes the tarsi are recurved against the ventral surface of the base of the abdomen and apex of thorax so that they do not extend beyond apices of wings 15 Apical segment of abdomen obtuse, armed with short or elongate spines or thorns, or if ending in a pair of long, slender processes. 745 746 748 747 749 750 Figs. 745-750. Nematocerous Diptera, Pupae 745. Simulium, ventral view (Malloch) Simuliidae. 746. Bibiocephala, side view (Malloch) BlepharoceratidEe. 747. Bibio, ventral view (Malloch) Bibionidse. 748. Sciara, side view (Malloch) Sciaridae. 749. Ceroplatus, side view. Ceroplatidae. 750. Leia, side view (Malloch) Mycetophilidse. they are more or less oval in transverse section and without strap-like hairs; tarsi generally entirely straight, rarely the apices of the hind pair incurved slightly, but never recurved as above stated 20 15. Thoracic respiratory organs terminating in numerous thread-like filaments , part Thoracic respiratory organs consisting of a single stem, in some cases with a few long, or many short, scale-like surface hairs, but never terminating in numerous thread-like filaments; oc- casionally the thoracic respiratory organs not elevated 16. 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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