Text-book of comparative anatomy . FIG. 321.—Larva (maggot) of honey bee. anatomyof the digestive and nervous systems (after ). y, Brain; bm, ventral chord; oe, oeso-phagus ; sd, spinning glands; cd, mid-gut, or chylestomach ; ed, hind-gut, not yet connected with the mid-gut ; vm, Malpighian vessels ; an, anus ; st, stigmata. oe. FIG. 3-22.— Enteric canal ofPsyllopsis fraxinicola (afterWitlaczil). oe, (Esophagus ; mrf,mid-gut; ed, hind-gut; vm, Mal-pighian vessels ;s, the coil formedby the hind-gut and the mustanterior part of the mid-gut. 2 vessels which unite together before enteri
Text-book of comparative anatomy . FIG. 321.—Larva (maggot) of honey bee. anatomyof the digestive and nervous systems (after ). y, Brain; bm, ventral chord; oe, oeso-phagus ; sd, spinning glands; cd, mid-gut, or chylestomach ; ed, hind-gut, not yet connected with the mid-gut ; vm, Malpighian vessels ; an, anus ; st, stigmata. oe. FIG. 3-22.— Enteric canal ofPsyllopsis fraxinicola (afterWitlaczil). oe, (Esophagus ; mrf,mid-gut; ed, hind-gut; vm, Mal-pighian vessels ;s, the coil formedby the hind-gut and the mustanterior part of the mid-gut. 2 vessels which unite together before entering a common duct. In Alctia,(Lepidoptera}, there are on each side 3 vessels with short common terminal pieces(Fig. 348, p. 488). In Gallcria (Lepido2)tera) there is an unpaired terminal piece intowhich 5 or 6 branched vessels enter. In Ephippigcra and the GryUidcc (Orthoptera}there are numerous vessels which, uniting into a tuft, enter the hind-gut througha long common ductus excretorius. In Orthezia (Coccidcc) there are on each side 2vessels which unite. The 2 terminal ducts themselves enter an unpaired terminalpiece. The pupa; of the Jfoctuina have 3 pairs of vessels, united in pairs, entering anunpaired urinary bladder. Lygaeus (Hcmiptera] has on each side 2 vessels entering aurinary bladder. 464 COMPARATIVE ANATOMY CHAP. The
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
