. The biology of dragonflies (Odonata or Paraneuroptera). Dragon-flies. 262 CLASSIFICATION [CH. Subfamily 3. Petalurinae (fig. 120). Triangle of forewing slightly elongated transversely, that of hindwing shghtly elongated longitudmally. Subtriangle of forewing large, reticulated; that of hindwing simple. Median space free. Anal loop absent or rudimen- tary. Eyes well separated. Labium with incised median lobe. Female with complete ovipositor. Insects of large Fig. 120. Wings of Petalura gigantea Leach, <J, New South Wales. (Hw. 57 mm.) Original. Larva subcylindrical, with short 7-joi
. The biology of dragonflies (Odonata or Paraneuroptera). Dragon-flies. 262 CLASSIFICATION [CH. Subfamily 3. Petalurinae (fig. 120). Triangle of forewing slightly elongated transversely, that of hindwing shghtly elongated longitudmally. Subtriangle of forewing large, reticulated; that of hindwing simple. Median space free. Anal loop absent or rudimen- tary. Eyes well separated. Labium with incised median lobe. Female with complete ovipositor. Insects of large Fig. 120. Wings of Petalura gigantea Leach, <J, New South Wales. (Hw. 57 mm.) Original. Larva subcylindrical, with short 7-jointed antennae (fig. 43). Mask flat, with thick, shghtly hollowed lateral lobes and short movable hook; no setae; median lobe triangular. Gizzard with eight fields, dentition much reduced. GUIs simplex imdulate. Subfamily 4. Cordulegastrinae (fig. 121). Triangles equal, shghtly elongated; subtriangles incomplete. Median space free. 31 ^ not waved. Eyes nearly or just touching. Labium with incised median lobe. Female with large projecting ovipositor with valves of seg. 9 absent. Larva hairy, with oval abdomen, slender 7-jointed antennae, divergent wing-sheaths (cf. fig. 33). Mask spoon-shaped, with mental and lateral setae; lateral lobes with small movable hook and comphcated dentition. Gizzard with four bilaterally symmetrical fields. Gills simplex undulate. Subfamily 5. Aeschninae. Triangles approximately equal, elongated longitudinally, crossed; sub- triangles weak or absent. Strong compact anal loop formed between A2 and A^. Median space free or crossed. M^ waved. Eyes meeting mid- dorsally for a long distance (except Petaliini). Labium with median lobe shghtly incised, or with a longitudinal depression. Female with complete 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 Tillyard, Robin John,
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