. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BRUES AND MELANDER: CLASSIFICATION OF INSECTS 287 37. Calypteres conspicuous, but not concealing halteres, their margin fringed; head widely hemispherical (Fig. 527); third antennal joint composed of four to eight annuli; branches of third vein (R4 and R5) widely diverging and enclosing tip of wing; females usually blood-sucking. A large family of conspicuous flies, occurring in all regions, most species tropical. Horse-flies, Gad- flies, Deer-flies Hind tibise without apical spurs b Hind tibiae with two a
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BRUES AND MELANDER: CLASSIFICATION OF INSECTS 287 37. Calypteres conspicuous, but not concealing halteres, their margin fringed; head widely hemispherical (Fig. 527); third antennal joint composed of four to eight annuli; branches of third vein (R4 and R5) widely diverging and enclosing tip of wing; females usually blood-sucking. A large family of conspicuous flies, occurring in all regions, most species tropical. Horse-flies, Gad- flies, Deer-flies Hind tibise without apical spurs b Hind tibiae with two apical spurs which sometimes are minute, .h Third antennal joint divided into four, rarely three, segments. (Hsematopota, widespr.; Heptatoma, Eur.). Third antennal joint divided into five segments, antennae there- fore apparently seven-jointed, rarely indistinctly ten-jointed, .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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