MATERIALS FOR A FAUNA CANADENSIS. 461 



the dorsum fuscous, apex of the segments black, with an interrupted 

 yellow basal lunule ; apical segments entirely blackish-fuscous ; wings 

 hyaline, the costa yellow, pterostigma short, the sides a little oblique, 

 black. Length 53-41 millim. ; alar expanse 49-41 miUim. ; pteros- 

 tigma 1:^ millim. 



Hub. : U. S. Chicago, Minnesota, Indiana, Pennsylvania, New 

 York, Mass. 



Calopteryx, Leach. 



C. ViRGiNiCA, Drury ed. Westwood. — C. dimidiata, Bamhur. 



Brassy-green, shining ; labium, antennae, thoracic sutures, pectus, 

 venter, and feet black ; abdomen with the dorsal stripe, venter with 

 segments 8-10 yellow ; wings narrow, hyaline, the base somewhat 

 flavescent, the apex blackish-fuscous ; pterostigma in the female snow- 

 white. Length 50-52 millim. ; alar expanse 70-72 millim. ; pteros- 

 tigma 2 millim. 



Hah. : Hudson's Bay, U. S. Mass. and Southward. 



C. maculata, Beauv. — C. holosericcus, Burm. — 

 C. PAPiLiONACEA, Ramb. 

 Brassy-green or blue, shining ; labium, antennae, thoracic sutures, 

 pectus, venter, and feet black ; abdomen with a dorsal yellow stripe, 

 8-10 segments in the female ; wings very broad, densely reticulated, 

 black, sometimes with hyaline spots in the male, or clouded with fus- 

 cous, and fuscous at the apex, the female with a snow-white pteros- 

 tigma. Length 38-48 millim.; alar expanse 63-65 millim. ; pteros- 

 tigma 2-2^ millim. 



Hab. : U. S. Chicago, Mass. and Southward. A species common 

 and widely diffused. 



C. APiCALis, Burm. 



Brassy-green, shining ; labium, antennae, thoracic sutures, and 

 pectus black, or in the female in part flavescent ; feet long, black, 

 with long cilia; wings narrow, hyaline, or with the apex narrowly 

 fuscous, pterostigma absent. Length 42 millim. ; alar expanse 62 

 millim. 



Hab.: U. S. Pennsylvania, Mass. 



