66 A VEXATIOXAL STUDY OF THE ZYGOPTERA 



39 (36). Cui not more than one cell long and not reaching the cross-\-ein which 

 comes down from the subnodus (this true in the hind hind wing at least). The 

 space between the base of INIu and I\Ii+2 at least four-fifths of that between the 

 fork of Mi+2and the subnodus, in the hind wing 40 



40 (41). Cui less than one cell long. Ms arising before the subnodus. The stigma 

 longer than wide. The second antenodal space about one-half as long as the third. 

 The space between the forking of AI1+2 and the base of Mia is longer than that be- 

 tween the subnodus and the forking of Mi+2, in the hind wing. Australia. 

 (Fig. 141.) Notoneura Tilhard, 1913 



41 (40). Cui about one cell long. Ms arising beyond the subnodus. The stigma 

 about as wide distally as long. The second antenodal space as long as the third ; 

 the space between the base of Mia and the forking of M1+2 not as long as that be- 

 tween the subnodus and the forking of M1+2 in the hind wing. Australia. (Fig. 

 142.) Oristicta Tillyard, 1913 



42 (19). Ac at or before the level of the first antenodals; Cui usually not extending 

 to the level of the subnodus 43 



43 (50)- Cui generally not reduced to a cross-vein, but extending beyond MA. Cu2 

 may be lacking. Ri on lower side of stigma not zigzag, but straight 44 



44 (47) . Quadrangle widened distallj-. Area back of M4 beyond MA broad, at least 

 one-third as great as the width of the wing at that point 45 



45 (46). Head very small, thorax narrow, legs short, abdomen exceedingly attenuate. 

 About nine postnodals. Australia. (Fig. 141.) Notoneura Tillyard, 1913 



46 (45). Head larger, thorax not so narrow, but form robust, tibiae with many spines. 

 About fourteen postnodals. Australia. (Fig. 151.) . .Nososticta Selys, 1S60 



47 (44). Quadrangle not widened distally. x^rea beyond MA not so broad as 

 above 4^ 



48 (49). Ms in some species arising just beyond subnodus. Cuiin species from East 

 Indies is at least two cells long, in Australian species less. In Australian species 

 at least, "both superior and inferior appendages of males somewhat forcipate, the 

 inferior pair prolonged beyond the superior." New Caledonia, Bismarck Arch- 

 ipelago and Torres Straits. (Fig. 150.) Isosticta Selys. 1885 



49 (48). Ms always arising before the subnodus. Cui in the front wing almost 

 always less than two cells long, generally ending in the first cell beyond MA. 

 Malaysia to Bismarck Archipelago. (Fig. 152.) Risioneura^s gen. nov. 



50 (43). Cui reduced to a cross-vein, not extending beyond MA. Ri on lower side 

 of stigma zigzag. Ms arising beyond the subnodus. New'Guinea. (Fig. 153.) 



Selysioneura Foerster, 1900 



33 This genus is made for those species of Caconeura (Alloneura) included by Selys 

 (1886) in his second group and differs from Caconeura, sens. .strict., in having Ac situated 

 under or before the first antenodals and Cui rarely long enough to reach the cross-vein 

 coming down from the subnodus. R. plagiata Selys is the genotype; the other species 

 included are R. insignis Selys, R. erythroprocta Selys, R. wallacii Selys, R. exul Selys, 

 R. moluccensis Selys, R. flavipennis Selys, R. salomonis Selys, R. circumscripta Selys. R. 



