CORDULEGASTER. 115 



a stripe and line, and the sides with two broad oblique stripes, a 

 line between them, yellow; feet very long, black; abdomen long, 

 cylindrical, the dorsum black, with a stripe upon the middle, and 

 each side a ventral one, yellow; appendages short, yellow, the 

 superior ones stout, incurved at apex, bidentated beneath, the 

 inferior appendage quadrangular, broad, incurved at the apex ; 

 wings subfumose, pterostigma long, brownish-black. 16 19 ante- 

 cubitals ; 13 14 postcubitals ; 2 discoidal areolets. 



Length 7378 millim. Alar expanse 104 114 millim. Ptero- 

 stigma 6 millim. 



Hob. New York (Dr. Asa Fitch); Wisconsin (Kennicott); 

 Columbia. 



Division II. Labium bifid. 

 CORDULEGASTER LEACH. 

 Eyes subcontiguous. 



1. C. sayi. 



Cordulegaster sayi Selys 1 Monog. Gomph. 331, 109. Selys ! Synops. 85, 

 106. 



Black, spotted with yellow ; head yellow, rhinarium black ; tho- 

 rax black, dorsum with two stripes, sides each with two stripes and 

 an intermediate line, yellow; feet black; abdomen long, black, 

 annulated with yellow ; appendages of the male black, superior 

 ones trigonal, divaricated, with a basal tooth beneath, the inferior 

 appendage quadrangular; appendages of the female yellow; vulvar 

 lamina elongated, bifid; wings hyaline, pterostigma long, yellow; 

 membranule whitish. 18 antecubitals ; 11 postcubitals; 2 disc- 

 oidal areolets. 



Length 60 millim. Alar expanse 84 millim. Pterostigma 4J 

 millim. 



Jfab. Georgia (British Museum). 



It is similar to C. annulatus Charp., of Europe. 



2. C. maculatus! 



Cordulegaster maculatus Selys! Monog. Gomph. 337, 111. Selys ! Synops. 

 86, 108. Aeschna obliqua Say, var. A ? Jour. Acad. Philad. VIII. 

 16,8. 



Brownish-black, hairy, spotted with yellow ; head yellow, with 



