. The biology of dragonflies (Odonata or Paraneuroptera). Dragon-flies. XIV] CLASSIFICATION 263 Larva with elongated abdomen and slender 7-jointed antennae (fig. 29 A-D). Mask flat, without setae (exc. Gynacantha); lateral lobes narrow, with apex of variable form; long movable hook. Gizzard with four radially symmetrical fields carrying a few large speciaHzed teeth. Gills duplex, but not Fig. 121. Wings of Cordulegaster annulatus Latr., (J, Britain. (Hw. 46 mm.) Original. Tribe 1. Petaliini (fig. 122, also PI. I, fig. 1). Triangles only moderately elongated, very close to arculus a
. The biology of dragonflies (Odonata or Paraneuroptera). Dragon-flies. XIV] CLASSIFICATION 263 Larva with elongated abdomen and slender 7-jointed antennae (fig. 29 A-D). Mask flat, without setae (exc. Gynacantha); lateral lobes narrow, with apex of variable form; long movable hook. Gizzard with four radially symmetrical fields carrying a few large speciaHzed teeth. Gills duplex, but not Fig. 121. Wings of Cordulegaster annulatus Latr., (J, Britain. (Hw. 46 mm.) Original. Tribe 1. Petaliini (fig. 122, also PI. I, fig. 1). Triangles only moderately elongated, very close to arculus and to base of wing. Rs unforked. A series of dark brown or red blotches along costal. 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, 1881-1937. Cambridge [Eng. ] : University Press
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