PHILIP A. MUX/ 51 



ic (11). One or two sectors Ix-twcen Mi and Mia; others fmm Mh. to M., and M4 



and Cui. Malaysia. (Fig. 53.) Rhinagrion Calvert, 1913 



(Aviphilestes Selys, 1862) 



11 (10). No sectors between Mi and Mi^ 12 



12 (13). Three antenodals, the third one being costal and beyond the arculus. One 

 row of cells back of Cuj. New Caledonia. (Fig. 54.) . . Trineuragrion Ris, 1915 



13 (12). Two antenodals. Generalh^ at least two more or less complete rows of 

 cells back of Cih. Australian region. (Fig. 56.) Argiolestes Selys. 1862 



14 (9). Xo sectors between Rsand M3 15 



15 (16). A genus of the Old World. Three cells below the stigma, postnodals about 

 twenty. Thibet? Mesopodagrioni^ McLachlan, 1896 



16 (15). Genera of the New World. One cell below the stigma: postnodals about 

 fifteen 17 



17 (18). Three rows of cells in the area between Mu, and M2, with two unbroken- 

 sectors between M.. and Rs. In the male the stigma is two and one-half times as 

 long as wide. Brazil. (Fig. 57.) Megapodagrion Selys, 1885, sens, strict. 



18 (17). Two rows of cells in the area between M^, and M2 and one sector between 

 M2 and Rs- Stigma about twice as long as wide. Xorthi'rn South' America. 

 (Fig "^8.) Allopodagrion Foerster, 1910 



19 (8). -Vt least one wing petioled to be\()nd the level of the arculus 20 



20 (21). At least one sector between M4 and Cui. Sectors present Mia to Cui. 

 Generally two or more rows of cells back of Cu2, at least part way. Australian 

 region. (Fig. ^56.) Argiolestes Selys, 1862, sens, strict. 



21 (20). Xo sectors between M4and Cui. One row of cells back of Cu-j 22 



22 (29). Supplementary sectors between R, and Ms as well as Mh. to Rs and be- 

 tween M.j and M4- Cui not strongly arched beyond MA 23 



23 (24). The anterior of the sectors between Rsand M3 shorter than the posterior 

 one. Fi\e cross-veins under the stigma. The longest sector between Mh^ and 

 M2 arising four to six cells before the inner end of the stigma. Between M3 

 and M4 only one sector is more than three or four cells long. Costa Rica to 

 Brazil. (Fig. 59.) Philogenia Selys. 1862 



24 (23). The anterior of the sectors between Rsand M3 is longer ihan the posterior 

 one. Two or three cross-\eins under the stigma. The longest sector between 

 Mir, and M2 arises not more than one or two cells before the inner end of the 

 stigma. Between M3 and M4 art' often two sectors more than three cells long, 

 especially in the hind wing 25 



25 (26). Wing not petioled beyond ihe arculus. At least three cells Ijetween MA 

 and the level of the subnodus in the area between M4 and Cui. Sui)i)lementary 

 sectors (one or two each) from Mu, to M4. Labuan and Sumatra. (Fig. 60.) 



Podolestes Selys, 1862 



26 (25). Wing is petioled be> ond the arculus. Two cells between M.\ and the level 

 of the subnodus in the area between M4 and Cui- Supplementary sectors (two 

 each) from M^, to -M4 27 



'^ Description only was available for ihis genus. 



MEM. AM. EXT. SOC, 3. 



