. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CLASSIFICATION OF INSECTS 63 metathorax fused, oblique; cerci one-jointed; legs not large, similar, usually armed with spines, placed far forward, tarsi three-jointed; wings four, nearly alike, elongate, membranous, net-veined, not folded, with characteristic nodus, arculus and triangle (see Figs. 41, 42). Abdomen long and narrow, cylindrical or flattened, sometimes clubbed at apex; ovipositor sometimes complete; male sexual apparatus attached to the second sternite. Metamorphosis considerable, the nymphs aquatic, no
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CLASSIFICATION OF INSECTS 63 metathorax fused, oblique; cerci one-jointed; legs not large, similar, usually armed with spines, placed far forward, tarsi three-jointed; wings four, nearly alike, elongate, membranous, net-veined, not folded, with characteristic nodus, arculus and triangle (see Figs. 41, 42). Abdomen long and narrow, cylindrical or flattened, sometimes clubbed at apex; ovipositor sometimes complete; male sexual apparatus attached to the second sternite. Metamorphosis considerable, the nymphs aquatic, no resting pupal stage. Damsel flies, Dragon Figs. 35-40. Odonata 35. Lestes (Garman) Lestidae. 36. Chromagrion, base of fore wing (Garman) Coenagrionidae. 37. Hemiphlebia, wing (Needham) Hemiphlebiidae. 38. Megalestes, wing (Needham) Synlestidx. 39. Mecistogaster, wing (Needham) Pseudostigmatidae. 40. Pseudagrion, wing (Tillyard) Coenagrionida:. Adults 1. Disoidal cell in fore wing never divided by a vein, although it is rarely divided in the hind wing; wings petiolate, sub-petiolate or without stalked base; nodus almost always before the middle of the wing; fore and hind wings essentially alike in form and venation; slender species, nearly always resting with the wings closed above the body 2 Discoidal cell of both wings divided into two parts by an oblique vein into a triangle and supra triangle; wings never petiolate, nor with a distinctly narrowed stalklike portion at the base; hind. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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