Smithsonian miscellaneous collections . Pbl. Fig. i.—Head and proboscis of adult muscoid flies. A, Musca domestica L., anterior. B, Calliphora vicina (erythrocephalaMeigen), clypeus and proboscis. C, Callitroga macellaria (F.), ventral. D,Gonia sp., with ptilinum everted. sclerotized, decurved hooks (mh) partly covered by lateral folds ofthe integument. Below the bases of the hooks is a soft median lobe(Lb), which at least serves the larva as an under lip, and appears tobe a true larval labium. Above the labium, between the bases of the 4 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 122 ho
Smithsonian miscellaneous collections . Pbl. Fig. i.—Head and proboscis of adult muscoid flies. A, Musca domestica L., anterior. B, Calliphora vicina (erythrocephalaMeigen), clypeus and proboscis. C, Callitroga macellaria (F.), ventral. D,Gonia sp., with ptilinum everted. sclerotized, decurved hooks (mh) partly covered by lateral folds ofthe integument. Below the bases of the hooks is a soft median lobe(Lb), which at least serves the larva as an under lip, and appears tobe a true larval labium. Above the labium, between the bases of the 4 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 122 hooks, is the food-intake orifice of the larva (Atr), but it leads im-mediately into an atrial chamber before the mouth of the larval suckingapparatus. The larval organ of ingestion is a suction pump lying within thethorax, supported by a strongly sclerotized structure commonly calledby students of cyclorrhaphous larvae the buccopharyngeal skeletonor the cephalopharyngeal apparatus (fig. 2 B). By whatever namethis complex structure is known
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Keywords: ., bookcentury1800, bookdecade1860, bookidsmiths, booksubjectscience
