No. 39] ODONATA OF CONNECTICUT: AESHNIDAE I9I 



Aeshna umbrosa Walker 



Canadian Entomologist, 40: 380, 390: 1908. 



N)niiph (PI. Ill, Fig. i). — Color dark brown or buff-colored, 

 without definite stripes. 



Head: mentum (PI. vi, Fig. 5) less than twice as wide at base 

 as at apex; the labial palpi (Fig. 7, No. 5) squarely truncate at 

 apex of proximal segment ; labium not extending to the meta- 

 coxae. 



Thorax: rather prominent projections over the procoxae; legs 

 uniform brown or indefinitely marked with pale rings on femora 

 and tibiae ; wing-cases extending to the middle of segment 4 in 

 full-grown specimens. 



Abdomen : with lateral spines on segments 6-9 inclusive, uni- 

 form brown in color. 



Measurements : total length, 46 mm. ; length of abdomen, 27 

 mm. ; length of hind femora, 8 mm. ; length of mentum, 7 mm. 



Fig. 36. Aeshna umbrosa, anal 

 appendages and color pattern of 

 thorax. (From Howe.) 



Described from a nymph collected at Litchfield, Connecticut, July 13, 

 1922, and the exuviae of a reared nymph collected in Hamden, Connecticut, 

 July, 1923, emerging July 26, 1923. 



Adult, male (PI. xviii, b). — Color dark brown, marked with 

 yellowish green. 



Head: occiput one-third to one-half as long as the line of 

 contact between the eyes ; face brown, the lateral margins next 

 the compound eyes pale; no black stripe on the fronto-clypeal 

 suture. 



Thorax: lateral pale stripes (Fig. 36; Fig. 38, No. 3) less than 

 2 mm. wide, usually about 1.5 mm., yellowish green or buff sur- 

 rounded by dark brown, the dorsal bands yellowish green, the 

 cephalic ends pointed and separated by about 4 mm. ; remainder 

 of the thorax uniform dark brown ; anal triangle of the hind wings 

 3-celled. 



Abdomen : strongly constricted at segment 3, the color pattern 



