. Elementary entomology. Entomology. CHAPTER III ANATOMY OF INSECTS — EXTERNAL Body structure. The extinct ancestors of the insects were doubtless elongate, wormlike animals composed of a series of cylindrical segments very similar in structure and with a pair of jointed appendages attached to each segment. The mouth being. Fig. 8. Types of insect antennae A, filiform, from grasshopper {Sckisiocoxa mnericana) ; B, clubbed, or clavate, from teneb- rionid beetle {Xyctobates fcnnsylvatiiats) ; C, pectinate, or feathered, from a moth ; Z), aris- tate, with dorsal plumose arista, from a fly; E, lam
. Elementary entomology. Entomology. CHAPTER III ANATOMY OF INSECTS — EXTERNAL Body structure. The extinct ancestors of the insects were doubtless elongate, wormlike animals composed of a series of cylindrical segments very similar in structure and with a pair of jointed appendages attached to each segment. The mouth being. Fig. 8. Types of insect antennae A, filiform, from grasshopper {Sckisiocoxa mnericana) ; B, clubbed, or clavate, from teneb- rionid beetle {Xyctobates fcnnsylvatiiats) ; C, pectinate, or feathered, from a moth ; Z), aris- tate, with dorsal plumose arista, from a fly; E, lamellate, from a May-beetle {Lachnosiema fused) ; F, moniliform, from a beetle at the anterior end, the appendages near it were developed to secure and tear up the food. Thus the mouth-parts were gradu- ally evolved, and-the segments bearing them grew closer together until they coalesced and formed a single well-defined region, the head. With the development of wings the appendages of the pos- terior segments were useless and soon disappeared, and the legs on the three segments immediately back of the head became. 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 Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882; Metcalf Collection (North Carolina State University). NCRS. Boston, Ginn
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
