78 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [BuU. 



Thorax : pronotum without pits or yellow spots on the entirely 

 black median lobe. The mesostigmal plates are narrow, the 

 caudal margins almost straight, and have a pale spot on the lateral 

 angle sometimes occupying more than half the plate. The meso- 

 pleural pale stripe is much contracted at the mesostigmal plates 

 and is in contact with them only at the lateral angles. 



Abdomen : terga with dorsa of i-io black or dark from base to 

 apex. 



Measurements : total length, male 25-26, female 25 mm. ; length 

 of abdomen, male 20, female 19 mm. ; length of hind wings, male 

 14-15, female 15 mm.; width of hind wings, male 3.5, female 

 4 mm. 



Described from three males obtained through the kindness of 

 Dr. R. H. Howe, and a female from Dr. P. P. Calvert. 



Enallagma recurvatum Davis 



Journal New York Entomological Society, 21: 15-16: 1913. 



Nymph. — Unknown. 



Adult, male. — Color blue and black. 



Head : labrum blue ; anteclypeus blue, postclypeus mostly black ; 

 face blue to the level of the antennae; postocular spots oval or 

 comma-shaped ; postocellar stripe wanting ; rear of head mostly 

 pale. 



Thorax : pronotum entirely black except small spots on the 

 lateral angles of the caudal lobe ; propleura largely pale ; meso- 

 and metathorax with narrow blue stripe on each mesepisterna, the 

 stripe contracted and sometimes interrupted, forming an exclama- 

 tion point ; ventral half of the mesepimera and all of the meta- 

 pleura blue, except a small black spot on the metapleural suture 

 at the wing bases ; legs with femora dark above, the tibiae with 

 black stripe, tarsi dark brown or black, the claws with ventral 

 tooth well beyond the mid point, near the distal fourth ; wings with 

 Mo arising near the fourth postnodal cross-vein in the front wing 

 but usually well proximad of this point in the hind wing. 



Abdomen : tergum i with basal half of dorsum black, remainder 

 blue; 2 blue except a black spot covering the caudal half of the 

 dorsum ; 3 blue with dorsal spot occupying caudal third or a little 

 more ; 4 with dorsal spot covering about half the dorsum ; 5 and 

 6 with similar spots covering nearly four-fifths of each ; 7 black 

 except basal rings and lateral margins ; 8 and 9 blue, 8 sometimes 

 with a narrow black line on the sides ; 10 black above, pale on 

 sides ; anal appendages with the superiors strongly upturned at 

 tip in lateral profile, the inferiors considerably longer. 



Measurements : total length, 26-27 mm. ; length of abdomen, 

 20-22 mm.; length of the hind wings. 14-15 mm. 



