BY R. J. TILLYARD. 419 



This species is most allied to .1 . x-fcroinclds, which it closely 

 resembles in form. It can, however, be readily distinguished 

 from the latter species by its colouration, its much thicker 

 pterostigma, by the considerabl}'^ longer appendages of the 

 male, and by the wings being all of the same length. 



Types: d* 9 , Coll. Tilly ard. 



7. Argiolestes fontanus, n.sp. 



cf. Total Icni/tli 37, dhdomen 30, forrir'nifi 24, Jiindirinf/ 

 23 mm. 



Wings tinged with light brown: pnsfiiix/dls, fore 18-19, 

 liind 15-16: pterostujiiKi 1 mm. thick, black. Head com- 

 pletely black, except a large squarish ochreous patch between 

 the face and each eye. Thorax: prothorax black, with yel- 

 lowish-brown spots in front and on sides, also a narrow col- 

 lar of the same colour behind. Mrso- and nip.tathorax black ; 

 on each side a narrow humeral yellowish -brown stripe, 3 mm. 

 long, not reaching interalar ridge : sides irregularly striped 

 with black and yellowish-brown. T'Cijs black, slender, rather 

 short. Abdomen very slender, nearly cylindrical, 1-2 

 and 8-10 very slightly enlarged. Colour: 1-2 metallic green- 

 ish-black, a pale ochreous stripe low down on each side ; rest 

 dull black. Appendages: superior very forcipate, 1 

 7nm., black, very slender, apical portion turned sharply in- 

 wards, almost at right angles to the rest of the appendages, 

 and cai-rying an interior projecting leaf or shelf. Seen in 

 profile, they are curved into a low arch, with base and tips 

 enlarged; no large inferior spine. Inferior 0-1 mm., triangu- 

 lar (Plate xliv., figs. 9, 10.). 



9 . Total length 33, ahdomen 26, wings 25 and 24 mm. Tt 

 differs from the male in having broader thoracic markings of 

 straw-colour ; abdomen shorter and slightlv broader. Aji- 

 pendages 0-4 mm., black, sharply pointed. Ovipositor \A?iQk, 

 large, but not reaching beyond end of abdomen. 



Bah. — Dorrigo, N.S.W. ; twelve males and two females; 

 also a single, slightlv smaller male taken on the Bellinger 

 River, at Thorah ; December, 1911. 



40 



