. The biology of dragonflies (Odonata or Paraneuroptera). Dragon-flies. Fifj. 185. Dragonfly larva mounted on opal glass in specimen jar containing 70 per cent, alcohol ( x V). Original f] rawing bv P. Tillvard. Fig. 186. Exuviae of Ausfrogo77iphu'i manifestus Tillvard (New South Wales), cleaned and mounted on a cardboard slip ( x 1). Original. or up smooth vertical rocks. Other ingenious devices are given by Needham [97]. Larvae can be dried and carded (like Coleoptera); but they make better specimens if kept in alcohol. The larva shoidd be placed alive in alcohol (70 per cent., or 50-60 per
. The biology of dragonflies (Odonata or Paraneuroptera). Dragon-flies. Fifj. 185. Dragonfly larva mounted on opal glass in specimen jar containing 70 per cent, alcohol ( x V). Original f] rawing bv P. Tillvard. Fig. 186. Exuviae of Ausfrogo77iphu'i manifestus Tillvard (New South Wales), cleaned and mounted on a cardboard slip ( x 1). Original. or up smooth vertical rocks. Other ingenious devices are given by Needham [97]. Larvae can be dried and carded (like Coleoptera); but they make better specimens if kept in alcohol. The larva shoidd be placed alive in alcohol (70 per cent., or 50-60 per cent, warm to hot). As soon as it is dead, a small incision should be made ventrally along segments 3-5 (mid-gut region), to allow the alcohol to penetrate there. If this is not done, the contents of this part of the abdomen will decay, and cause these segments to become unnaturally distended, often ruining the specimen. My series of larvae are mounted with silk on slips of opal glass, and placed in 4 x 1, or 4 x 1|- inch cylindrical specimen jars with strong bases, in 70 per cent, alcohol (fig. 185).. 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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