Notes on the Genus Erythemis i i 



Prothorax and thorax yellowish or greenish red, possibly bright red in 

 life in old males, unmarked. Legs yellowish (ochraceous-tawny of Ridg- 

 way), the antero-dorsal surface of the first femur and tibia black; second 

 femur with the same surface largely black, and a narrow line of black on 

 the same surface of the second tibia ; third femur with the same surface 

 with an ill-defined, restricted, subapical black area equal in length to about 

 one-fourth the length of the femur; a narrow interrupted line on the same 

 face of the third tibia ; all tarsi darker, obscure to black ; all spines and teeth 

 on the legs, black, of usual form. Front wings at base with a trace of yel- 

 lowish red. Hind wings with a yellowish red basal spot which anteriorly 

 reaches the first antenodal and posteriorly is slightly more extensive, a few 

 of the included cells sometimes with a dark reddish brown spot at the center. 

 Stigma brown, narrowly shaded darker along the anterior edge. 



Abdomen, including accessory genitalia and apical appendages red, the 

 genitalia and appendages paler, yellowish ; all unmarked, except for restricted 

 black edgings on some carinas, especially on the apical carina ; segments 4-9 

 in dorsal view shading apically into darker red. Abdomen inflated at base, 



3 at base 5 high, 4, 1.6 high; 4-6 in dorsal view measure about as follows: 

 4, 1.6 wide at mid-length, and 4.8 long; 5, 1.9 wide and 4.6 long; 6, 2.1 wide 

 and 4.4 long; 7-9 are about as wide as 6, 9 slightly narrower, and 10 is about 

 1.8 wide; in length, 7-10 are, respectively, 3.6, 2.4, 2, and i. In profile at 

 mid-length, 4 is about i.i high; from this point the abdomen gradually 

 thickens posteriorly to the apex of 8, which is about 1.8 high. Lateral and 

 ventral carinas on segment 3 separated at the apex by about .8, at the level 

 of the point where the lateral meets the median transverse by about 1.6; on 



4 the lateral carina is about 4.7 long and the lateral and ventral carinas are 

 separated by a distance of .5 to .7. 



Female. — Rear of head pale dull yellowish, a reddish brown spot on 

 either side above and below against the eye, head pale as in the male but dull 

 pale greenish brown without trace of red, the labium and anteclypeus 

 yellowish. 



Thorax dull green (about Saccardo's olive of Ridgway in dried speci- 

 mens), unmarked. Legs slightly duller than in the male, similarly marked. 

 Wings hyaline without basal markings or with yellowish red at the base to 

 a varying extent, from a mere trace to, at the other extreme, in the front 

 wings about one-third the distance to the first antenodal and in the hind 

 wings slightly beyond the first antenodab Stigma brown, narrowly sliaded 

 darker along the anterior edge. 



Abdomen dull green, about the same color as the thorax, with 4-10 apic- 

 ally dark; 1-3 with the carinas slightly darker or more yellowish than the 

 body of the segments ; 4-7 shading to black apically, the apical third to half 

 of each segment dark; 8-10 largely or entirely dark to black; the appendages 

 and the lamina supra-analis lying between them yellowish to black, the latter 

 about .67 long and i wide at base, triangular, the apex truncated, about .3 

 wide, and each posterior angle a rounded knob or tubercle so the apex is 

 broadly emarginate or divided. Abdomen inflated at base, 3 at base about 

 4.5 high, 4 about 2.1 high; 4-6 in dorsal view measure about as follows: 4, 



