. Insects, their ways and means of living. Insects. INSECTS pends upon the finer structure and the mechanism of the parts before us. Each one of the second pair of bristles has a furrow along the entire length of its inner surface, and the two. Fig. 121. The structure of the head and sucking beak of the adult cicada A, the head in side view with the beak (Bk) in natural position B, the head of an immature adult: the mouth (Mth) opened, exposing the roof (e) of the sucking pump (see fig. 122), and the tonguelike hypopharynx (Hphy); the parts of the beak separated, showing that it is composed of
. Insects, their ways and means of living. Insects. INSECTS pends upon the finer structure and the mechanism of the parts before us. Each one of the second pair of bristles has a furrow along the entire length of its inner surface, and the two. Fig. 121. The structure of the head and sucking beak of the adult cicada A, the head in side view with the beak (Bk) in natural position B, the head of an immature adult: the mouth (Mth) opened, exposing the roof (e) of the sucking pump (see fig. 122), and the tonguelike hypopharynx (Hphy); the parts of the beak separated, showing that it is composed of the labium (IJ>), inclosing normally two pairs of long slender bristles (MdB, MxB, only one of each pair shown) a, bridge between base of mandibular plate (Md) and hypopharynx (Hphy); Aclp, anteclypeus; Ant, antenna; Bk, beak; Clp, clypeus; e, roof of mouth cavity, or sucking pump; Ge, gena (cheek plate); Hphy, hypopharynx; Lb, labium; Lm, labrum; Md, base of mandible; MdB, mandibular bristle; Mth, mouth; Mx, maxilla; MxB, maxillary bristle; NMb, neck membrane; O, ocelli bristles, small as they are, are fastened together by inter- locking ridges and grooves, so that their apposed fur- rows are converted into a single tubular channel. In the natural position, these second bristles lie in the sheath of the beak (Fig. 121 A) between the somewhat larger first bristles. Their bases separate at the tipJof [ 202 ]. 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 Snodgrass, R. E. (Robert E. ), 1875-1962. New York Smithsonian Institution series
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Keywords: ., bookauthorsnodgrassrerobert, bookcentury1900, booksubjectinsects
