CALOPTERYX. 57 



cilia ; wings narrow, hyaline, or with the apex narrowly fuscous. 

 (Male.) Twenty antecubitals. Pterostigma absent. 



Length of body 42 millim. Alar expanse 62 millim. 



Hob. Philadelphia ; Massachusetts (Scudder). 



3. C. dimidiata ! 



Calopteryx dimidiata Burm.! Handb. II, 826, 16. Selys ! Synops. Calopt. 

 10,4. Monog. Calopt. 25,4. Walk. Catal. 591,4. Calopteryx cog- 

 nata Ramb.! Neuropt. 222, Q. C. syriaca Ramb.! Neuropt. 223, 9. 

 (In part. Male.) 



Brassy-green or blue, shining; labiura, antenna?, thoracic sutures, 

 pectus, venter, and feet black; wings narrow, somewhat flavescent, 

 the apex fuscous ; pterostigma of the female snow-white. Male 

 30 antecubitals; female 20 antecubitals. 



Length of body 40 45 millim. Alar expanse 54 56 millim. 

 Pterostigma 1| millim. 



Hob. Kentucky ; Georgia ; Pilatka, St. John's River, Florida 

 (Osten Sacken). 



4. C. maculata ! 



Agrion maculata Beauv. 85 ; tab. vii, fig. 3. Calopteryx maculata Burin.! 

 Handb. II, 829, 17. Selys ! Synopt. Calopt. 10, 5 Selys ! Monog. 

 Calopt. 27, 5. Walk. Catal. 592, 5. Calopteryx holosericeus Burm.! 

 Handb. II, 828, 13. Ramb. Neuropt. 226, l^. Calopteryy^papilio- 

 nacea Ramb.! Neuropt. 222, 6. Calopt. opaca Say, Jour. Acad. 

 Philad. VIII, 32, 2. 



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

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

 upon the 8th to the 10th segment (?); wings 'very broad, densely 

 reticulated, black, sometimes with hyaline spots (J*), or clouded 

 with fuscous and fuscous at the apex, with a snow-white pterostig- 

 ma (female) 19 28 antecubitals. 



Length 38 48 millim. Alar expanse 63 65 millim. Ptero- 

 stigma 2 2 millim. 



Hob. Chicago (Osten Sacken) ; Maryland (TJhler) ; Washing- 

 ton; Trenton Falls (Osten Sacken); Philadelphia; Massachusetts; 

 Dalton, Georgia (Osten Sacken); Carolina; Ohio; Pilatka, Flo- 

 rida (Osten Sacken). 



A species common all over the Union. 



