. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CLASSIFICATION OF INSECTS 385 represented at most by two facets; wingless, long-legged species, parasitic on bats. Bat-tick flies. (See couplet 178.) (Nycteribia (Fig. 663), Bacflia, Cyclopodia, PeniciMdia) . NYCTERIBlIM: Head not folding back upon the mesonotum which is not strongly flattened and expanded; abdominal segments more or less fused 148. Figs. 662-666. Braulidx, Nycteribiidae, Streblidae, Hippoboscidae 662. Braula, dorsal aspect. Braulidae. 663. Nycteribia, dorsal aspect. Nycteribiidae. 664. Trichobius, do

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. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CLASSIFICATION OF INSECTS 385 represented at most by two facets; wingless, long-legged species, parasitic on bats. Bat-tick flies. (See couplet 178.) (Nycteribia (Fig. 663), Bacflia, Cyclopodia, PeniciMdia) . NYCTERIBlIM: Head not folding back upon the mesonotum which is not strongly flattened and expanded; abdominal segments more or less fused 148. Figs. 662-666. Braulidx, Nycteribiidae, Streblidae, Hippoboscidae 662. Braula, dorsal aspect. Braulidae. 663. Nycteribia, dorsal aspect. Nycteribiidae. 664. Trichobius, dorsal aspect (Brues) Streblidae. 665. Trichobius, profile of head (Brues) Streblidae. 666. Pseudolfersia, dorsal aspect (Lugger) Hippoboscidae. 148. Palpi broader than long, projecting leaf-like in front of head; wings when present usually with distinct parallel veins and outer cross- veins, at least the principal .veins not crowded forward; claws simple; almost always ectoparasites of bats. Bat flies. (See coup- let 179.) (Strebla, Aspidoptera, Ascodipteron, Megistopoda, Nycterophila, Pterellipsis, Trichobius (Figs. 664, 665)). strSblim Palpi slender and elongate, forming a sheath for the proboscis; wings if present with the stronger veins crowded along the costa. 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 work.. Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum