PHILIP A. Ml.NZ 57 



(B) "Arciilus at, or vcr\- near to, the second anlenodal; M> oa the hind wings arising 

 nearest the fourth postnodal; costal edge of the stigma of the hing wings shorter 

 than the proximal or distal edges; Ciii and Cu2 not reaching as far distad as the 



level of origin of Mia and M2 ; A separating from the hind 



margin proximal to, or less frequently at, the cubito-anal cross-vein , 



which is situated nearer the level of the first than of the second antenodal; venation 

 of the tips of front and hind wings similar, abdomen chieBy red, tenth segment of 

 the male not elevated doVsally, vulvar spine?" Considerable orange and red in 

 the coloration, witli black markings. Brazil. (Fig. 96.) 



Tigriagrion Calvert, 1909 



43 (4(S). Wing not i)eti()led all the \va\- to .\c 44 



44 (47). ( ienera of the Xew World 45 



45 (46). .-\i)donien chieH\- red. The costal side of tlie stigma not shorter than the 

 proximal or distal sides. Ciii extending at least to or beyond the level of the base 

 of Mia. Cii-.. to or bexond that of M .. In the hind wing the inner end of the quad- 

 rangle not as long as the upjter side. North and South America. (Fig. 88.) 



Amphiagrion Selys, 1876 



46 (45). Abdomen generalK- with some red. The costal edge of the stigma is shorter 

 in the hind wing than the proximal or distal sides. \'enation otherwise much like 

 the preceding. Mexico and United States. (Fig. c)^.) 



Hesperagrion CaKert, 1902 



47 (44). Cienus of the Old World. Front margin of the stigma longer than the pos- 

 terior one. Quadrangle exceedingly narrow. South Ab\s.sinia. 



Thermagrion-' Foerster. 1906 



48 (43). W ing petioled to or beyond Ac 49 



49 (50). Agenus of the Old World. Coloration largeh- black and blue, 'i'ibiaewith 

 long spines. Lower tooth of tarsal claw almost as large as theui)i)er. Oceanica. 

 (Fig. 1 16.) Xiphiagrion SeKs, 1876 



50 (49) . (ienera of the Xew World 51 



51 (52). M:i not arising very close to the subnodus, but at least one-half cell Ix'tore it. 

 Coloraticjn light, much red. Color ])attern of dorsum of thorax with no markings 

 darker than brown. Some blue often present. South .America and Western 

 North .America. (Fig. ux).) Oxyagrion Si'lxs. 1876 



52 (51). Ms arising \cr\ near the subnodus, not more tiian oiie-hfth ol a cell before 

 it. .Abdomen chieflv reddish and xcllowish. (Fig. 127.) 



Leptobasis SeKs, 1.S77 

 54 (42). F'emale without apical si)ine on segment eight 54 



54 (5rt)- Two comi^lete rows of cells be\ ond the stigma between C and Ri. this area 

 much broader than the corresjionding one between R, and M,. The wing-margin 

 slightK- indented at tlu' stigma. Considerable red in the bod\ coloration. Fast 

 Indies. (Fig. 87.) Oreagrion Ris, i9i,> 



55 (54). Rareh two comiilete rows of cells be\ond the stigma between C and Ri- 

 Wing-margin not indented at the stigma 5^' 



-' Studied from (l{'scri|)lion oiil\'. 



MEM. .\M. E.\T. SOC. ."v 



