. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 556 557 Figs. 556, 557. Cyclorrhaphous Antennae and Tarsus 556. Antenna: A, Dolichopus, Dolichopodidae; B, Drapetis (Williston) Empididae; C, Volucella (Williston) Syrphidse; D, Gonia (Williston) Tachinidse; E, Glossina (Hegh) Glossinidae. 557. Musca, end of tarsus, showing hair-like empodium (Kellogg) Muscidae 50. No functional frontal suture or lunule above antennae, front uni- formly chitinized, without an anterior median differentiated stripe; no alula 51 Frontal suture well developed as a horseshoe-shaped groove
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 556 557 Figs. 556, 557. Cyclorrhaphous Antennae and Tarsus 556. Antenna: A, Dolichopus, Dolichopodidae; B, Drapetis (Williston) Empididae; C, Volucella (Williston) Syrphidse; D, Gonia (Williston) Tachinidse; E, Glossina (Hegh) Glossinidae. 557. Musca, end of tarsus, showing hair-like empodium (Kellogg) Muscidae 50. No functional frontal suture or lunule above antennae, front uni- formly chitinized, without an anterior median differentiated stripe; no alula 51 Frontal suture well developed as a horseshoe-shaped groove over the antennae continuing down so as to separate the center of the face from the sides, frontal lunule present as a crescentic sclerite between the antennae and the frontal suture (Fig. 594),' middle part of front nearly always differentiated from the orbits; calypteres and alula usually pronounced; arista almost 1 The frontal suture is forced open by the protrusion of the ptilinum, an eversible sac, for prying off the lid of the puparium at the time of emergence of the adult. Newly emerged flies of this group sometimes show the ptilinum; in older flies the ptilinum is withdrawn and the frontal suture closes to form the characteristic seam over the antennas. The lid of the puparium opens by a circular cleft (see Fig. 763), hence the significance of the group-name Cyclorrhapha, meaning circular seam. In the coordinate group Orthorrhapha (including couplets 32 to 49) the pupa case opens by a dorsal straight longitudinal seam (see Fig. 707) and accordingly the frontal suture and ptilinum are not 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
Size: 2301px × 1086px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
