No. 39] ODONATA OF CONNECTICUT: COENAGRIONIDAE 8l 



wings and M2 usually arising between the fourth and fifth of 

 these. 



Abdomen: blue and black, dorsum of terga 1-9 and 10 with 

 longitudinal black stripes from base to apex, widened subapically 

 on 2-7, and narrowed to the meson on 8 at the hind margin ; lateral 

 surfaces of terga 1-8, 10, all of 9, narrow apical ring on i and 

 broad basal rings on 4, 5 and 6, blue or pale; anal appendages 

 (Fig. 10, No. 13) black, the superiors bifurcate, the dorsal arms 

 shortest ; inferiors usually paler and shorter than the superiors. 



Female. — Color pale green, black and brown ; tip of abdomen 

 blue. 



Head : postocular spots usually connected with the narrow 

 stripe behind the ocelli ; genae and area above the clypeus more 

 or less orange in color. 



Thorax : with the brown of the mesopleural dark stripe more 

 conspicuous and persistent than in the male. Mesostigmal plates 

 as in Fig. ii, No. 9, not reaching the katepisterna on the sides. 



Abdomen : with broad dorsal stripes on segments 1-8, the stripe 

 on 9 being reduced to two triangular spots (sometimes united) at 

 the base of the tergum, the remainder blue in color; tergum 10 

 blue ; lateral surfaces of 2-8 and narrow basal rings on 3-8 usually 

 pale green. 



Measurements: total length, male 31-35, female 30-32 mm.; 

 length of abdomen, male 26-29, female 24-26 mm. ; length of hind 

 wings, male 17-19, female 20-23 mm.; width of hind wings, male 

 3-4, female 3.5-4 mm. 



Connecticut. — Putnam, 12 July, 1905 (H. L. V.) ; Stratford, 9 July, 

 1920; Guilford, 27 July, 1920 (P. G.). 

 New England. — May 28-August 27. 



Enallagma traviatum Selys 



Bulletin de TAcademie royale . . . de Belgique, 41: 517: 1876. 



Nymph. — Color very dark brown. 



Head : caudo-lateral margins projecting, antennae slender, the 

 first two segments setose and their diameter much greater than the 

 remaining ones; labium extending behind the first pair of coxae; 

 mental setae two, sometimes a small third ; lateral setae four. 



Thorax : lateral portion of the prothorax and the metapleura 

 darker than the dorsum of the thorax ; femora with distinct pre- 

 apical brown rings, tarsi pale. 



Abdomen : brown, darker immediately above and below the 

 lateral keels ; cuticle without small black spots at the bases of the 

 setae; keels with a few (usually i or 2) spines near the apices; 

 gills (PI. II, Fig. 4) rather narrowly lanceolate, the median gill 

 without heavy spines on the dorsal margin ; lateral gills with 

 ventral marginal row of spines extending one-half or less of the 



