No. 39] ODONATA OF CONNECTICUT: COENAGRIONIDAE 65 



pleural suture often reduced to an indefinite brown area near the 

 middle of the horizontal portion of the suture, black spots adjacent 

 to the dorsal margin of the katepisterna and cephalad of the wing 

 bases ; dorsal third of the mesokatepisterna with crescentic dark 

 marks; metapleural suture with black spot cephalad of the wing 

 bases ; remainder of the mesopleura and metapleura yellow ; legs 

 mostly yellow, the coxae and trochanters pale, femora with a faint 

 dorsal line, the tibiae also with a faint dorsal line or row of dashes ; 

 tarsi and claws tipped with brown, wings with 9-1 1 postnodal 

 cross-veins in the front wing, and M2 arising between the fourth 

 and fifth of these. 



Abdomen: yellow and black, the dorsum of terga i-8 inclusive 

 with black longitudinal stripes from near their bases to apices; 

 lateral margins of 1-8, basal rings on 3-7, and a narrow apical 

 ring on i, yellow; all of the ninth and tenth terga blue, except a 

 narrow niesal stripe on the tenth; anal appendages (Fig. lo. No. 

 14) brown, the superiors longer than the inferiors, broad at their 

 apices ; inferiors yellow, their black apices directed mesad. 



Female. — Color lemon-yellow or pale blue, and black. 



Head : as in the male. 



Thorax: mesostigmal plates (Fig. ii. No. 4) with rounded 

 lateral margins which are contiguous with the katepisterna. 

 Mesopleural stripes of the suture less distinct than in the male. 



Abdomen : similar to the male except that terga 9 and 10 are 

 usually yellow, the ninth having a triangular black dorsal spot. 



Measurements : total length, male 32-34, female 32-34 mm. ; 

 length of abdomen, male 26-28, female 26-28 mm. ; length of hind 

 wings, male 17-19, female 18-21 mm.; width of hind wings, male 

 3.5-4, female 3-3.5 mm. 



Connecticut. — Hamden, 18 July, 1920; Litchfield, 22. July, 1920; Guil- 

 ford, 13, 27 July, 1920; North Branford, 22 June, 1922 (P. G.). 

 New England. — June 8- September 6. 



Group 2 CiviLE-CARUNCULATUM Group. 

 Enallagma calverti Morse 



Psyche, 7 : 208 : 1895. 



Nymph. — Color buff. 



Head : labium extending to the second pair of coxae ; mental 

 setae 4 ; lateral setae 6 ; marginal setae of the mentum 4 or 5. 



Thorax : metathoracic wing-cases extending to the middle of 

 abdominal segment 4 in some nymphs. 



Abdomen : segments 3-10 with dorsal transverse rows of setae 

 at the caudal margin, lateral keels strongly developed, setose, the 

 keel of the first segment with a number of spinules (3), the second 

 keel with 8 or 9, 3-8 with 10-12 spinules, and 9 with a row in line 

 with the preceding lateral keels ; gills very long, somewhat spatu- 



