No. 39] ODONATA OF CONNECTICUT: COENAGRIONIDAE 75 



brown or black, lateral margins pale; 8, brown or black with 

 large blue spots occupying the larger portion of the sclerite and 

 separated from one another by a mesal line of black (Fig. ii, No. 

 22) ; dorso-apical margin of 7 and 8 blue. 



Measurements : total length, male 26-27, female 26-27 mm. ; 

 length of abdomen, male 20-21, female 21 mm.; length of hind 

 wings, male 15, female 16 mm.; width of hind wings, male 3.5, 

 female 3-4 mm. 



Connecticut. — Mount Carmel, 23 June, 1902 (E. J. S. M.) ; New Haven, 

 26 June, 1902 (E. J. S. M.), 23 June, 1904 (H. L. V.), 11 June, 1914 

 (B. H. W.) ; I June, 1921 (M. P. Z.) ; Guilford, 30 July, 1920; Hamden, 

 30 May, 1922 (P. G.), 6 July, 1922 (J. L. R.) ; New London, 22 June, 

 1921 (R. H. H.). 



New England. — June 15-October 2. 



Enallagma hageni Walsh 



Proceedings of the Entomological Society of Philadelphia, 2: 234: 1863. 



Nymph. — Color buff or greenish. 



Head ; subelliptical, the caudo-lateral angles projecting slightly 

 caudad and armed with a few heavy setae ; antennae with the 

 third segment longest, the second longer than the first; labium 

 extending to the second pair of coxae, the mental setae of the 

 median lobe three, the lateral setae usually five, and the marginal 

 setae usually three or four. 



Thorax : legs with faint preapical femoral rings of brown ; 

 tarsi and claws pale ; metathoracic wing-cases extending to the 

 middle of the fourth abdominal segment. 



Abdomen : a row of spots on the cephalo-lateral angles of the 

 terga and sterna of segments 2-9 ; lateral keels strongly developed, 

 setose, the first keel usually without setae, the second, third and 

 fourth with a bunch of four or five at the apices, the fifth with 

 about five apical setae and a weaker row extending to the base of 

 the segment ; sixth, seventh and eighth keels with six setae at the 

 apices and a proximal row of about nine setae on each ; segment 

 9 without lateral keel, but with a row of setae along the line of 

 the lateral keels, composed of two heavy setae near the caudal 

 margin and a straight row of six smaller setae extending cephalad 

 to the margin of the segment; cuticle of the abdomen without 

 dark spots at the bases of the minute setae which cover the sur- 

 face ; dorsum of segments 2, 3, and base of 4 with long hairs ; 

 gills (PI. I, Fig. 9) lanceolate, almost colorless, widest beyond 

 the middle and rather obtusely pointed; tracheae pigmented in 

 certain areas which form about twelve alga-like patches around 

 the margins of the gills ; dorsal marginal setae of the median gill 

 extending half way from the base to the tip and composed of more 

 than twenty setae ; ventral setae of the lateral gills extending more 

 than half-way from the base to the tips of the gills; apical 

 margins with a few scattered hairs. 



