738 ON SOME REMARKABLE AUSTRALIAN CORDULIIN^, 



ing the hitherto unknown male of the beautiful Macromia 

 Tillyardi Martin, and two males of the exceedingly rare Hemi- 

 cordulia intermedia Selys, of which only one other specimen, the 

 type-male, is known to exist. These are also described in this 

 paper. 



Austrophya, ng. 



Allied to Neophya Selys, and to Cordulephya Selys. Upper 

 side of triangle of forewinga broken, so as to form a quadrilateral, 

 the proximal segment of the upper side being about twice as long 

 as the distal. All the triangles free; forewings with a quadri- 

 lateral subtriangle, free. Arculus of hindwing arising very close 

 to the internal angle of the triangle. Triangle of hindwing 

 rather broad. Basilar spaces free; one cross-nervule in sub- 

 median space of fore wing, two in that of hindwing, the second 

 being placed directly under the arculus, so as to form a small 

 subtriangle. Sectors of arculus united at base. One row of cells 

 in the discoidal area following the triangle of the forewings. 

 Forewings narrow; hindwings very broad. Nodus of forewings 

 placed twice as far from base as from pterostigma. Head rather 

 small; thorax remarkably small, the distance from the interalar 

 ridge to the prothorax, measured dorsal ly, being under 3 mm. 

 Tibise with long slender spines. 



Type Austrophya mystica, n.sp.* 



The differences in venation between the three allied genera 

 Neophya, Cordulephya and Austrophya are best seen by the 

 following comparative summary : — 



Neophya Selys (N. Rutherfordi Selys, type). 



Triangle of forewings with the upper side broken, forming a 

 quadrilateral, the two segments being approximately equal. All 



* I have elsewhere condemned the practice of proposing new genera from 

 female characters only, and am still of opinion that it is extremely unde- 

 sirable. In the present instance, however, the new species is far removed 

 from any known species, and the female possesses all the necessary characters 

 for the formation of the genus, so that I hasten to put it upon record and 

 to assign to it its proper, if somewhat isolated, position in the subfamily of 

 Corduliince. 



