. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. 292' COMPARATIVE ZOOLOGY. sands in the winged Insects). They are never placed on movable stalks, as the Lobster's. Besides these, there are three simple eyes, called „ ocelli. The mouth may be fitted for bit- ing (masticatory), as in Beetles, or for suck- ing (suctorial), as in Butterflies. The mas- ticatory type, which is the more complete, and of which the other "7 is but a modification, consists of four horny jaws (mandibles and rnaxillee) and an u
. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. 292' COMPARATIVE ZOOLOGY. sands in the winged Insects). They are never placed on movable stalks, as the Lobster's. Besides these, there are three simple eyes, called „ ocelli. The mouth may be fitted for bit- ing (masticatory), as in Beetles, or for suck- ing (suctorial), as in Butterflies. The mas- ticatory type, which is the more complete, and of which the other "7 is but a modification, consists of four horny jaws (mandibles and rnaxillee) and an up- per and an under lip (labrum and labium). Sensitive palpi (max- illary and labial) are developed from the lower jaw and lower lip. The labium is also prolonged into a ligula, or tongue. The legs are invari- ably six in the adult, the fore-legs direct- ed forward and the hinder pairs back- ward. Each consists of a hip, thigh, shank, and Some larvse have also " false legs," without. Fig. 262.—Under surface of a Beetle (Harpalus cali- ginosus): a, ligula; b, paraglossae; c, supports of labial palpi; d, labial palpus; e, mentura; /, in- ner lobe of maxilla; g, outer lobe; h, maxillary palpus; mandible; k, buccal opening; Z, gula, or throat: m, buccal sutures; n, gular suture; o, prosternum ; p, episternum of prothorax ; pf, epi- meron; g, q', q'\ coxae; r, r, r, trochanters; .9, a\ s", femora, or thighs; t, t\ t", tibae; v, ventral abdominal segments; w, episterna of mesothorax; mesosternum; j/, episterna of metathorax; y\ epimeron; 2, 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 Orton, James, 1830-1877; Birge, E. A. (Edward Asahel), 1851-1950. New York : Harper & Bros.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1883
