262 



CLASSIFICATION 



[CH. 



Subfamily 3. Petalurinae (fig. 120). 



Triangle of forewing slightly elongated transversely, that of hindwing 

 slightly elongated longitudinally. 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 size. 



Fig. 120. Wings of Petalura gigantea Leach, $ 

 South Wales. (Hw. 57 mm.) Original. 



New 



Larva subcylindrical, with short 7-jointed antennae (fig. 43). Mask flat, 

 with thick, slightly hollowed lateral lobes and short movable hook ; no setae ; 

 median lobe triangular. Gizzard with eight fields, dentition much reduced. 

 Gills simplex undulate. 



Subfamily 4. Cordulegastrinae (fig. 121). 



Triangles equal, slightly elongated; subtriangles incomplete. Median 

 space free. M z 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 complicated 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 A z 

 and A v Median space free or crossed. M z waved. Eyes meeting mid- 

 dorsally for a long distance (except Petaliini). Labium with median lobe 

 slightly incised, or with a longitudinal depression. Female with complete 

 ovipositor. 



