64 A VENATIONAL STUDY OF THE ZYGOPTERA 



12 (ii). Ac nearer the level of the second antenodal than of the first. The first 

 antenodal space less than one and one-half times the length of the second. Three 

 or four cells beyond the stigma. Brazil. (Fig. 135.). . .Idioneura Selys, i860 



13 (6). A ending in Cu under the quadrangle or in the wing margin, but not reach- 

 ing MA. 14 



14 (17). A ending in Cu on the posterior side of the quadrangle. A "cubito-anal" 

 cross-vein generally present before Ac. That edge of the stigma along the wing 

 margin shorter than that along Ri 15 



15 (16). Cui ending generally some distance beyond the level of the fork of M1+2, 

 about two-thirds of the distance from the nodus to the stigma. M1+2 forking 

 between one-third and one-half the distance from the subnodus to the stigma. 

 Mexico to Venezuela. (Fig. 136.) Palaemnema Selys, i860 



16 (15). Cuiending not more than a cell or so beyond the fork of M1+2, usually before 

 it, Mi+2 often forking less than one-third the distance from the subnodus to the 

 stigma. Ceylon to Malaysia. (Fig. 137.) Platysticta Selys, i860 



17 (14). A ending in the hind margin of the wing between Ac and MA. No cubito- 

 anal cross-vein before Ac. The costal edge of the stigma as long as that edge 

 along Ri. Southeastern Asia and Malaysia. (Fig. 138.) 



Hypos trophoneura^" gen. nov. 



18 (5). The vein A reduced to Ac, not extending beyond 19 



19 (43). Ac distinctly beyond the level of the first antenodal: Cui usually extending 

 beyond the level of the subnodus 20 



20 (35)- The subquadrangle shorter than the portion of the wing behind Cu-|-A and 

 before Ac. Genera of the New World and two of the East Indies and Southern 

 Asia 21 



21(24). Genera of the Old World. Labium with short lobes, z^bout sixteen post- 

 nodals ' 22 



22 (23). Accessory cross- vein before Ac. The costal edge of the stigma shorter than 

 that along R,. India to Malaysia. (Fig. 144.) Protosticta Selys, 1885 



23 (22). No accessory cross-vein before Ac. The costal edge of the stigma not 

 shorter than that along Ri. Malaysia, j Disparoneura Selys, i860, sens. lat. 



\ Caconeura^^ Kirby, 1890 sens, strict. 

 [ Alloneiira, Selys, i860 sens, strict. 



24 (21). Genera of the New World. Labium with elongated lobes. About twelve 

 postnodals 25 



'"This genus is created for those species of Disparoneura placed by Selys (1886) 

 in the third group, and has as its type gomphoides Rambur. It is distinct from Dis- 

 paroneura, sens, strict., by having A end before MA and not in MA, and by Cui usually 

 being much shorter than in Disparoneura. It receives its name from the fact that A 

 turns downward: viroar po<i)y) = a turning backward, and vtvpov= nerve. 



31 As here treated this genus comprises only the first group of Alloneura as given by 

 Selys (1886). It, therefore, contains the following species: C. dorsalis Selys, C. lansbergei 

 Selys, C. gracillima Selys, C. hyperylhra Selys, and C. dohrni Krueger. See rubric 49 

 for Risioneura. Dr. Ris and Mr. Laidlaw consider this section of Caconeura as belong- 

 ing to Disparoneura; the genus Caconeura thus passes out of existence, since C. dorsalis 

 is the genotype. See Ris (1915) and Laidlaw (1913). 



