PHILIP A. MIX/ 53 



46 (45). Sui)i)lemL-iuar\ sectors helwecMi Mjaiid R, and two lon^ ones Ijetween R3 

 and M:i. Xo cross-veins in the subquadrangle or before it. Ecuador. 



Heteropodagrion'* Selys. 1885 



47 (44). Ms separating from Mr- beyond the subnodus. Supplementary sectors 

 between Mia and M2, and Rs and M3. Colombia Mesagrioni^ Selys, 1885 



48 (37). Xo supplementary sectors between R^ and M., 49 



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

 Mo, some also between M- and Rs. and M., 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. Xo sectors be- 

 tween Mo and Re nor between M.3 and M4 5^ 



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

 ing very closeh' the posterior wing-margin. Cui not strongly arched beyond 

 MA 52 



52 (53)- One sector between M^, and Mj. Africa and Madagascar. 



Protolestes'^ Foerster, 1899 



53 (52). Two sectors between M,,, and -Mj. The Xew World, from Mexico to 

 Argentina. (Fig. 68.) Heteragrion Selys 1862 



54 (51). Xo supplementary sectors excei^t 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. R, 

 arising tour 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(05). The quadrangle touching the jmsterior wing-margin. The wing petioled 

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

 five to se\en cells beyond the subnodus. Costa Rica to Brazil. (Fig. 70.) 



Perilestes Selys, 1862 



Key to the Genera of the Subfamily Coenagrioninae 



1 (22). Quadrangle relatixeh' regui^ir, the upper side two-thirds to three-fourths 

 or more of the length of the lower in both wings. M^ and Cu-. 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 \ery regular fashion. Tibial sjjines and 

 quadrangle relati\ely long. (Legion Platyciiemis of Sehs for the most jxirt) .... 2 



2 (13). Wings generalh- plainly not petioled to Ac. R^arisingat the subnodus. . . .3 



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

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

 usualK- at least four. .\c 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 Mi and Cu,. Arculus under the second 

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



'5 Descriptions only were available for these genera. 



MEM. .\M. ENT. SOC, 3. 



