156 NEUROPTERA OF NORTH AMERICA. 



die, black; dorsum of the thorax rufous, the median sulcus yellow ; 

 the sides greenish-white, beneath terminated with black ; abdomen 

 long, narrow, triquetral, yellow, the base greenish-white, a dorsal 

 stripe, and another each side at base, shorter, and the sutures, 

 black ; appendages black ; feet black, base of the femora yellow- 

 ish; wings hyaline, a short basal line, a nodal point, and the apex, 

 blackish-fuscous; pterostigma large, black; membranule cinereous. . 



Adult Male. Thorax above, pruinose. 



17 — 20 antecubitals ; 15 — IT postcubitals ; four discoidal are- 

 olets. 



Length 58 — 61 millim. Alar expanse 100 millim. Pterostigma 

 7 millim. 



Hab. New Orleans, Louisiana ; Georgia ; Yirginia. 



14. L. axillena ! 



Libellula axillena Westwood. Duncan, Introduct. 292, pi. xxis, fig. 1. — 

 Libellula hjclia Ramb.! Neuropt. 55, 32 (in part). — Libellula leda Say, 

 Jour. Acad. Pliilad. VIIT, 22, 8. 



Similar to Lib. lydia, but differs from it by the male having the 

 front and labrum black, carbonareous, front metallic-blue above; 

 of the female, the labium and rhinarium black, the front reddish- 

 yellow, above metallic-blue ; tip of the vertex yellowish ; feet 

 black, the base of the femora hardly rufous ; the dorsal stripe of 

 the abdomen reaching to the thorax ; a stripe upon the anterior 

 margin of the wings, between the nodus and pterostigma, blackish- 

 fuscous. 



Length 50 — 60 millim. Alar expanse 80 — 92 millim. Ptero- 

 stigma 6 — 7 millim. 



Hab. Georgia ; New Orleans, Louisiana ; Florida (Osten 

 Sacken). 



Is it a variety of L. lydia ? 



15. L. flavida ! 



Libellula flavida Ramb.! Neuropt. 58, 35. 



Reddish-yellow; mouth, front and tip of the vertex, pale yellow ; 

 thorax rufous anteriorly, the median sulcus yellowish ; the sides 

 yellowish-white, with an oblique fuscous stripe; abdomen long, 

 triquetral, yellow ; a dorsal stripe, another at base, each side, and 

 the sutures, brownish-black ; the inferior appendage .pale ; feet 

 black, anterior femora yellowish beneath ; wings hyaline, the ante- 



