DESCRIPTIONS OF AUSTRALIAN .ESCHNIN^. 41 



while the other lives in tubes constructed in mud or peat, and is very 

 probably able to breathe air directly. Such habits have nothing in common 

 except divergence from the normal^ and probabl}' represent two extreme 

 lines of specialization by larvae that were ousted from their original habitat 

 in the water by more progressive forms. They cannot, to my mind^ be used 

 as arguments in favour of the view that the ancestors of our Odonata once 

 possessed laud-living larvae. There are other more cogent arguments for 

 that view. 



Telephlebia asthenes, n. sp. 



(^ unknown. 



? . Total length 48*5 mm., abdomen 37'5 mm., fore- and lund-wings 35 mm. 

 each ; expanse 73 mm. (Plate 4. fig. 4.) 



Wings. — Hyaline, bases lightly saffroned for 3-4 mm. Neuration open, 

 dark brown. Triangles of medium length, 3-4-celled, that of hiud-wing 

 slightly the broader of the two ; basal side of both 1 mm. distad from arculus 

 (Plate 8. fig. 20). Basilar space with 3—5 cross-veins, suhnedian space with 

 6-7, the hist forming a Aveak subtriangle. Hyp)ert7'igonal space with 3-4 



cross-veins. Nodal Indicator I 14.15 14 j. Sc prolonged beyond nodus for 

 only one complete celPs length, very regular (Plate 8. fig. 24). Pterostigma 

 short, 2*0 X 0"8 mm., biconvex, pale brownish (Plate 8. fig. 16). Memhranule 

 practically obsolete (Plate 8. fig. 32). No brown hands on wings. 



Head. — Shiny brown, slightly paler on labruni and between vertex and 

 frontal ridge. Eyes large, rather flattened, meeting for 2'5 mm. 



Thorax. — Short, small; almost black, with pale yellow dorsal ridge, 

 two very distinct brown dorsal patches, and, on each side, a lemon-yellow 

 lateral band ; underside grey-brown. Legs brown, tlhice with numerous 

 spines. 



Abdomen. — 1-2 swollen, 3 scarcely pinched at all, 4-10 narrow cylin- 

 drical, flattened from side to side. Colour very dark browai ; a narrow basal 

 dorsal mark on 2, pale brownish, pointed distally ; apical portions of 3-6 

 paler dorsally. Ovipositor reaching to middle of 10, upcurved. Dentigerous 

 shelf of 10 not medially incised, rather squarish, with two lateral sets of 3-4 

 small teeth (Plate 8. fig. 26). 



Type : ? , Coll. Tillyard. Taken by Mr. E. J. Dumigan at Killarney, 

 S. Queensland, on Jan. 8th, 1914. 



An immature and somewhat damaged female, now in the Queensland 

 Museum, Brisbane, taken by Mr. H. Hacker at Mount Tambourine, 

 S. Queensland, on Nov. 4th, 1911, is the only other known specimen of this 

 rare species. It was not sufficiently mature or complete to form a satis- 

 factory type. It is somewhat larger than the type ; win}j;s 37 mm., with 

 one or two more antenodals. 



