No. 39] ODONATA OF CONNECTICUT: COENAGRIONIDAE 87 



Adults, Males 



1. Wings smoky (fumipennis) 



Wings clear 2 



2. Stigma surmounting more than one cell in both wings moesta 



Stigma surmounting one cell or less in both wings 3 



3. Proximal segments of the abdomen purplish or reddish violet violacea 

 Proximal segments of the abdomen never with purplish or reddish 



violet 4 



4. Proximal segments of the abdomen mostly pale blue with dark 



apical rings bipunctulata 



Proximal segments of the abdomen either entirely black with 

 narrow apical pale rings or with longitudinal stripes of dark 

 color on either side of each segment 5 



5. Dorsum of the mesothorax mostly pale; dorsal stripe covering the 



carina reduced to a line (apicalis) 



Dorsimi of the mesothorax mostly black, or with a broad black 

 stripe on the dorsal carina 6 



6. Dorsum of the thorax nearly or entirely black; segments 8 and 9 



of the abdomen black translata 



Dorsum of the thorax with some paler marks ; segments 8 and 9 

 blue 7 



7. Ventral arm of each inferior anal appendage exceeding the dorsal 



arm considerably sedula 



Ventral arm of each inferior appendage not exceeding the dorsal 

 arm in length (tibialis) 



Females 



1. Wings smoky (fumipennis) 



Wings clear 2 



2. Thorax with a broad black stripe ventrad of the mesopleural 



suture 5 



Thorax without a broad black stripe ventrad of the mesopleural 

 suture 3 



3. Mesostigmal plates with a sharp median caudal projection (Fig. 



II, No. 15) ; stigma surmounting more than one cell in both 



wings moesta 



Mesostigmal plates without a sharp median projection ; stigma sur- 

 mounting one cell or less in both wings 4 



4. Front vertex and occiput wholly brown ; caudal margins of the 



mesostigmal plates forming a thin blade which projects dorsad 



sedula 

 Front vertex and occiput not wholly brown; caudal margins of 

 the mesostigmal plates not forming a thin blade which projects 

 dorsad (apicalis) 



5. Mesostigmal plates each with a rounded lobe at the mesal angle 



(Fig. II, No. 16) 6 



Mesostigmal plates each without a rounded lobe at the mesal angle 7 



6. Terga 1-5 with a pale mid-dorsal stripe much broader than the 



black stripes on either side, the latter sometimes wanting or 



reduced to apical spots violacea 



Terga 1-5 with the pale mid-dorsal stripe not so wide as the black 

 stripes on either side translata 



7. Dorsum of the eighth tergum only, pale; black stripe below the 



mesopleural suture reaching the wing bases, and in contact with 



the suture for its entire length bipunctulata 



Dorsum of segments 8 and 9 black or dark brown ; stripe below 

 the mesopleural suture not reaching the wing bases and separat- 

 ing from the suture near its caudal end (tibialis) 



