PHILIP A. MUNZ 53 



46 (45). Supplementary sectors between* Mi and R, and two long ones between Rs 

 and M3. No cross-veins in the subquadrangle or before it. Ecuador. 



Heteropodagrioni^ Selys, 1885 



47 (44). M3 separating from M 1+2 beyond the subnodus. Supplementary sectors 

 between Mia and I\l.. and Rs and M3. Colombia Mesagrioni^ Selys, 1885 



48 (37). No supplementary sectors between Rg and M3 49 



49 (50)- Rs arising one cell beyond the subnodus. Two sectors between Mia and 

 M2, some also between M2 and Rs, and M3 and M4. Cui arched beyond MA. 

 South Africa. (Fig. 66.) Chlorolestes Selys, 1862 



50 (49). Rs arising at least two or three cells beyond the subnodus. No sectors be- 

 tween M2 and Rs nor between M3 and IVI4 5^ 



51 (54). At least some supplementary sectors present. Quadrangle not approach- 

 ing \er>- closely the posterior wing-margin. Cui not strongly arched beyond 

 MA 52 



52 (53). One sector between Mu, and M2. Africa and Madagascar. 



Protolestes^^ Foerster, 1899 



53 (52). Two sectors between Mia and M2. The New World, from Mexico to 

 Argentina. (Fig. 68.) Heteragrion Selys 1862 



54 (51). No supplementary sectors except Mia. The quadrangle at its distal end 

 approaches the hind margin of the wing. Cui strongly arched beyond MA .... 55 



55 (56) ■ The fore wing of the male with the inner end of the quadrangle lacking. 

 Ac about one-third of the way from the first to the second antenodals. R3 

 arising lour cells beyond the subnodus in the fore wing, three in the hind wing. 

 The upper side of the quadrangle distinctly shorter than the lower side. Aus- 

 tralia. (Fig. 69.) Chorismagrion Morton, 1914 



56 (55). The quadrangle touching the posterior wing-margin. The wing petioled 

 to Mia. M3 arising one to one and one-half cells beyond the subnodus, R, at 

 five to seven cells beyond the subnodus. Costa Rica to Brazil. (Fig. 70.) 



Perilestes Selys, 1862 



Key to the Genera of the Subfamily Coenagrioninae 



1 {22). Quadrangle relatively regular, the upper side two-thirds to three-fourths 

 or more of the length of the lower in both wings. M4 and Cu2 scarcely zigzag, so 

 that most of the cells of the wing are four-sided rather than five-sided ; the longi- 

 tudinal veins arranged in a parallel and very regular fashion. Tibial spines and 

 quadrangle relatively long. (Legion Platycnemis of Selys for the most part) . . '. .2 



2 (13). Wings generally plainly not petioled to Ac. Rs arising at the subnodus. . . .3 



3 (6). The upper side of the quadrangle more than three-fourths the length of the 

 lower side. Antenodal cells between M4 and Cui are three to five in number, 

 usualh- at least four. Ac near the level of the first antenodal cross-veins. The 

 first and second antennal segments short, the third long and slender 4 



4 (5). Three to five antenodal cells between M4 and Cui. Arculus under the second 

 antenodals. Africa. (Fig. 71.) Metacnemis Selys, 1863 



'^ Descriptions only were available for these genera. 



MEM. AM. ENT. SOC, 3. 



