DESCRIPTIONS OF AUSTRALIAN ^SCHNIN^. 61 



or hooks on raised segmental ridges on 4-10, sides of 3-4 angulated, but not 

 spined ; lateral spines large on 5—9 (Plate 9. iig. l(j). Appendages. — 

 Very remarkable ; superior 2 mm., small, very sharp, carrying above it in 

 the male the rather blunt inferior imaginal involucre^ in the female a sharper 

 spine, the involucre of the dorso-apical imaginal spine of 10; inferiors very 

 long, 5 mm., sharp, slightly incurved, and themselves armed with smaller 

 spines and a row of stiff hairs ; involucres of male superior appendages and 

 of female appendages equally long and sharp, 2 mm. (Plate 7. figs. 9, 21). 

 Ovipositor very small, only covering segment 9 (Plate 9. fig. 2). 



L a r V a 1 T y p e s : c? ? , Coll. Tillyard. (Guy Fawkes, N.S.W., Jan. 13th 

 and 14th, 1912.) 



Habitat. This insect is of somewhat restricted rano-e on the mountains of 

 Eastern Victoria and N.S.W. I have taken it near Alexandra, Vic. (Rubicon 

 Falls), on the Snowy River at Jindabyne, on the Blue Mountains (rare), and 

 at Gruy Fawkes (var. geminata^. 



Types : $ ? , Coll. Martin (c? Victoria, ? N.S.W.) . Var. geminata, <^ ? , 

 Coll. Tillyard. 



III. EGTOGENIC GROUP. 



Tribe yEscsNiNi. 



A. yESCHNA SERIES. 



M2 arching strongly up under pterostigma. Rs either not clearly forked 

 at all, or unsymmetrically forked close up to or under the level of the 

 pterostigma. Rspl curved concavely to the lower branch of the fork, so 

 as to enclose several rows of cells between ; Mspl similarly concave to M^. 

 Hind-wing of male angulated, about the same width near base as at nodus ; 

 the anal triangle long and narrow. Membrannle large. Anal appendages 

 not exceptionally long. Females with dentigerous plate under segment 10 

 either vestigial or absent. Auricles present in male. 



Larva with superior appendage bifid at tip, slightly shorter than the 

 sharply pointed inferiors. No setae on lateral lobes of labium. No papillse 

 on rectal gills. 



Only one genus is represented in Australia : — 



Genus 1. ^schna, Fahr. 



Characters as above, with these additions : — Basilar space free ; ptero- 

 stigma braced ; radial sector forked unsymmetrically, sometimes scarcely 

 forked at all (in the Australian species) ; triangles fairly elongate, typically 

 5-celled ; subcosta not prolonged beyond nodus. 



Type : y^.juncea (Linn.) Burm. 



Note on llie Name ^Eschna. — A great deal has already been written 

 regarding Fabricius's now famous word '' ^sJma/' which all subsequent 



