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, 6. C. syriaca Rainb.! Neuropt. 223, 9. 

 (In part. Male.) 



Brassy-green or blue, shining; labiura, antennae, 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 Burm.! 

 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, 14. Calopteryx papilio- 

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

 Philad. VIII, 32, 2. 



Brassy-green or blue, shining; labium, antennas, 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 (Uhler) ; 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. 



