Calvert : Odonata of the Neotropical Region. 183 



ning with that between 2 and 3, a rounded dorsal spot on the last fifth 

 of 5 and of 6, the dorsum of 7 and of 10, a superior dot (at three- 

 fifths' length of 8 and midway on 9) and an inferior longitudinal stripe 

 on each side of 8 and 9, which are otherwise blue. Ventral surface of 

 the abdomen chiefly yellow. 



Hind dorsal margin of 10 medially elevated and excised, the process 

 so formed having a tip, which in rear view appears to be about one- 

 fourth as wide as the segment and slightly bilobed. 



Superior appendages in dorsal view subequal in length to 10, sub- 

 parallel, widest at mid-length, apex subobtuse ; in profile view they 

 are directed caudad only slightly downward, tapering from base to 

 the subacute apex. 



Inferior appendages in profile view with the upper apical angle pro- 

 longed as a process reaching to three-fifths of the length of the superiors 

 and directed caudad, not curved upward ; in ventral view the processes 

 of the two inferiors converge somewhat, the tip of each terminating 

 on the inner side in a minute black hook. 



Legs pale yellow 



Wings clear, great veins of the anterior portions pale brown ; 

 stigma red, very oblique, costal edge equal to or shorter than the 

 proximal edge ; vein A (= inferior sector of the triangle of de Selys) 

 separating from the hind margin at the cubito-anal cross-vein (= basal 

 postcostal of de Selys). Front wings with 11- 12 postnodals. Hind 

 wings with 9 postnodals ; M 2 (= nodal sector of de Selys) arising at the 

 fourth. 



Abdomen 28, hind wing 19 mm. 

 ' 9 unknown. 



Habitat : — Brazil, Sao Paulo, September 14, 1900, by A. Hempel, 

 1 6\ Academy of Natural Sciences of Philadelphia. 



92. Oxyagrion rufulum Hagen. 



(Plate III, figs. 49, 50. ) 

 Agrion rufulum Hagen, Syn. Neur. N. Amer., p. 86. 1861. 

 Oxyagrion rufulum Selys, Bull. Acad. Belg. (2), xli, p. 302. 1876. 



Both descriptions of this species are based on imperfect specimens, 

 wherefore the following : 



c?. To an example from Quillota, bearing the label "Agrion vicinumcT 

 Hagen," I attached the following label in 1899, " Agrees with Hagen's 

 type of Ag, rufulum which has lost last three abd. segs. ' ' I have not 



