PETALURA ANAX. Ill 



whitish. Twenty-six antecubitals ; 17 20 postcubitals; two dis- 

 coidal areolets. 



Length 83 88 millim. Alar expanse 112 124 millim. Ptero- 

 stigma 6 millim. 



Hal. Indiana (Say); Georgia (Abbot); Connecticut (Norton). 



PETALURA LEACH. 

 Pterostigma extremely long. 



1. P. thoreyi ! 



Uropetala thoreyi Hagen! Monog. Gomph. 373, 122; pi. xix, fig. 3. 

 Tachopteryx obscura Uliler MSS. Tachopteryx thoreyi Selys ! Addit. 

 Synops. 25, 116 bis. 



Olivaceous, spotted with black ; head pale in front, with a black 

 band, and above black; thorax olivaceous, the sides with two ob- 

 solete black stripes; feet black; abdomen long, equal, olivaceous, 

 dorsum of the second segment with two spots, the following ones 

 with a spot upon the basal middle, an apical ring, and the last seg- 

 ments almost altogether black ; appendages black, superior ones 

 dolabriform, the inferior quadrangular, with a basal tooth above, 

 and the apex each side unguiculated; wings hyaline, pterostigina 

 narrow, very long, fulvous. Male. 18 20 antecubitals; 11 13 

 postcubitals ; three discoidal areolets. 



Length 78 millim. Alar expanse 100 millim. Pterostigma 9 

 millim. 



Hob. New York ; Maryland (Uhler) ; Fort Towson, Red River. 



Subfamily IV. AESCHNINA. 



Eyes contiguous; head globose; wings unequal, the posterior 

 ones broader ; triangles long ; genital organs of the female vagi- 

 nated. 



ANAX LEACH. 



Anal angle of the posterior wings rounded in the male ; second 

 segment of the abdomen not auriculated; abdomen with a lateral, 

 interrupted carina. 



