2 University of Michigan 



Hageii. Unfortunately specimens of species of this genus are 

 very, fragile. Apparently many specimens have been lost 

 from Hagen's collection, and information I have received 

 indicates that there has been considerable damage and loss in 

 the de Selys material. This is very unfortunate as certain 

 species are unidentifiable from existing descriptions. 



AcKXOWLCDGUMJCNTS. — Through Dr. Ris 1 have obtained 

 drawings by IMons. ]\Ienger of the material at present available 

 in the de Selys collection. Dr. jvis lias also furnished me 

 notes on material in his collection. I am especially indebted 

 to Dr. Calvert for the loan of specimens, for several drawings, 

 properly credited, and for suggestions. Other material of 

 the greatest interest was borrowed for study from the Carnegie 

 ]\Iuseum, through Mr. Kahl ; from the Museum of Compara- 

 tive Zoology, through Air. Banks; from Cornell University, 

 through Professor Xeedham ; and from the U. S. National 

 ^Museum, through Mr. Currie. ]\Ir. Kennedy kindly prepared 

 many of the drawings, properly credited, and the wing photo- 

 graphs. 



The Legion Podagrion of de Selys, as defined by him (i 

 and 2), has been briefly summarized by Calvert (5) as fol- 

 lows: M., separating from Mj+o nearer to the nodus than to 

 the arculus. Stigma normal, i.e., consisting of but a single cell. 

 Cuo present. Supplementary sectors present, at least between 

 Mja and Mj, except in Perilestes. 



The genus Heteragrion (including Pleteragrion and Oxy stig- 

 ma of this paper) of the Legion Podagrion may be brief- 

 ly defined as follows: Antenodals two-; AL arising at or 

 near the subnodus ; Rg arising distad to the subnodus (rarely 



2 Herbert Campion, Proc. Acad. Nat. Sci. of Phila., May, 1913, p. 222: "A 

 female of Heteragrion chrysof^s Hagen (alienum) from Vera Cruz, also in the 

 Godman-.Salvin Collection, lias, in three of its wings, a supernumerary antenodal 

 between the usual ones and limited to the costal space." 



