. The biology of dragonflies (Odonata or Paraneuroptera). Dragon-flies. XIV] CLASSIFICATION 267 Tribe 3. Idocorduliini (fig. 127). Triangle of hindwing distad from arculus. Median space free. Anal loop never more than two cell-rows wide, variable in length, without a widened "; Abdomen usually slender, not markedly corduliform. Fhght weak, graceful. Larva (Austrocordulia) short, with hard spiny body, very flat beneath; short legs; lateral lobes of mask deeply and irregularly broken (fig. 36 D).. Fig. 127. Wings of Austrocordulia refracta Tillyard, ^, Queensland. (Hw. 29 mm.) Orig
. The biology of dragonflies (Odonata or Paraneuroptera). Dragon-flies. XIV] CLASSIFICATION 267 Tribe 3. Idocorduliini (fig. 127). Triangle of hindwing distad from arculus. Median space free. Anal loop never more than two cell-rows wide, variable in length, without a widened "; Abdomen usually slender, not markedly corduliform. Fhght weak, graceful. Larva (Austrocordulia) short, with hard spiny body, very flat beneath; short legs; lateral lobes of mask deeply and irregularly broken (fig. 36 D).. Fig. 127. Wings of Austrocordulia refracta Tillyard, ^, Queensland. (Hw. 29 mm.) Original. This somewhat heterogeneous tribe includes two series: Series 1. OxygastraSevies. Forewing with M^ and Cti^ parallel (except in OompJiomacromia). Series 2. Idionyx-Series. Forewing with M^ and Cuj^ sUghtly divergent. Tribe 4. Cordulefhyini (fig. 128). Triangle of hindwing distad from arculus. Costal side of triangles of both fore and hindwing broken. Anal loop reduced to two or three large cells. Hindwing very narrow at base. Reduced forms with zigzag dodging flight; wings folded vertically over abdomen when at rest. Abdomen narrow, cylindrical. Larva of typical Eucorduline form (fig. 38), but with pecuhar long deep narrow incisions on the lower half of the lateral lobe of the mask. Tribe 5. Eucorduliini (figs. 129, 173). Triangle of hindwing completely recessed to level of arculus. Anal loop elongate, two cell-rows wide at base, and with a more or less distinctly widened "toe" distally; mid-rib well-developed. Abdomen very distinctly corduli- form. Larva with short oval or rounded abdomen, flattened beneath, smooth (cf. fig. 38); long legs; mask with lateral lobes regularly crenated along inner 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. Cambridg
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