Text-book of comparative anatomy . » FIG. 306.—Mouth parts of a Macrolepidop-tera larva (Ocneria). Lettering as in Figs. 303and FIG. 307.—A, Mouth parts of the Macrolepidoptera. B, The lower lip (2d pair of maxillae), isolated. Lettering as before, sr, Sucking proboscis, corresponding with the fused ridges of the3 st pair of maxillte. portions are fused into one common piece, but carry 3-jointed palps and masticatoryridges still distinctly separate. The 2 inner ridges have grown together and forma short tube. In the other Microlepidoptera the mandibles lose their teeth and become rudimen
Text-book of comparative anatomy . » FIG. 306.—Mouth parts of a Macrolepidop-tera larva (Ocneria). Lettering as in Figs. 303and FIG. 307.—A, Mouth parts of the Macrolepidoptera. B, The lower lip (2d pair of maxillae), isolated. Lettering as before, sr, Sucking proboscis, corresponding with the fused ridges of the3 st pair of maxillte. portions are fused into one common piece, but carry 3-jointed palps and masticatoryridges still distinctly separate. The 2 inner ridges have grown together and forma short tube. In the other Microlepidoptera the mandibles lose their teeth and become rudimentary. On the anterior maxilla; only 1 ridge is found. The ridges VI ANTENNATA—MOUTH PARTS 449 mcf. of the 2 pairs of maxillae fit together to form a sucking proboscis which can easilyhe coiled up. In the Macrohjiiifujitcra the mandibles have disappeared, .but thesucking proboscis formed by the 2 ,, ridges of the anterior maxillae is onthe contrary very strongly developed C(,and capable of being coiled. Themaxillar and labial palps are nearlyalways retained, the former generallyin a very reduced condition (1-jointedin the Xj
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
