Calvert: Odonata of the Neotropical Region. 185 



cell on all wings ; superior (anterior) side of the quadrilateral of the 

 front wings longer, two-fifths as long as the posterior side, 13 post- 

 nodals on the front wings, 10 (right)-i2 (left) on the hind, colors 

 similar to those of the Quillota cT but paler ; no markings or bands on 

 the thorax ; M 2 arising between the fourth and fifth postnodals on the 

 hind wings ; abdomen 26.5 ; hind wing 19 mm. 



9. A female from Penco agrees with the first Chilian female de- 

 scribed by de Selys, assuming that the abdomen of the latter was red- 

 dish-yellow. Abdominal segment 7 has a mid -dorsal bronze band of 

 equal width to that on 6, but not widened at the hind end of the seg- 

 ment which is attained; 8 has a similar band for the anterior two- 

 thirds of its length ; 9, 10, and the appendages yellow, unspotted, the 

 last one-and-one-half times as long as 10. A strong ventral apical 

 spine on 8. Genital valves yellow, not reaching to the level of the 

 hind end of 10, their "palps" also yellow, barely attaining the level 

 of the hind end of 11 (anal tubercle). Front wings with 11 (right) 

 -13 (left) postnodals; hind with 11, at the fifth of which M 2 arises- 

 Abdomen 26, hind wing 19 mm. 



A female from Cordova, probably younger, is intermediate in ab- 

 dominal markings between de Selys' two Chilian females, having 1 

 and 2 unmarked, 3-6 with a very narrow mid-dorsal bronze stripe 

 widened posteriorly on each into the "petite tete ronde," 7 and 8 

 have the mid-dorsal bronze stripe wider, apparently reaching the entire 

 length of 8, dorsum of 9 obscure at its hind end ; 11 postnodals on the 

 front wings, 9 on the hind ; other details as above given for the Penco 

 female. Abdomen 26, hind wing 19.5 mm. 



Habitat : Chile, Quillota, 1 d\ Museum of Comparative Zoology, 

 Cambridge, Mass. 



Penco, January, 1905, by Carlos E. Reed, 1 d\ 1 $. Academy 

 of Natural Sciences of Philadelphia. 



Argentina, Cordova, 1 $. Museum of Comparative Zoology, 

 Cambridge, Mass. 



Judging from de Selys' description of O. rubidum (Rambur), that 

 species, known by the male only, is very close to O. rufulum, differing 

 only in the slightly longer abdomen and in the coloring of its last four 

 segments. It is also possible that one or more of the females here or 

 elsewhere referred to O. rufulum may properly belong to O. rubidum. 



