No. 39] ODONATA OF CONNECTICUT: LIBELLULIDAE 



not divergent, those on 8 scarcely one-seventh as long as the lateral 

 margin of the segment, the basal width scarcely half the length, 

 those on 9 about one-sixth as long as the corresponding segment 

 margin, which is convexly arcuate at base and barely concave 

 beyond middle ; lateral appendages one-half shorter than segments 

 9 and 10 together and about the same length as the median 

 appendage. 



Measurements : length, 23-23.4 mm. ; width of abdomen, 8-9.25 

 mm. ; length of hind femora, 8 mm. 



Adult, male. — Color metallic green and black. 



Thorax : yellow marks on the sides, usually a spot and a stripe. 



Fig. 43. Nymph of Somato- 

 chlora el on gat a, x 1.7. (From 

 Walker.) 



Fig. 44. Sotnatochlora elongata 

 anal appendages of adult. (From 

 Howe.) 



Abdomen : entirely black without pale rings or spots ; anal 

 appendages (Fig. 44) almost straight, not bent downwards or 

 forcipate or with sharp lateral angles; tips slightly upturned but 

 not recurved. 



Female. — Vulvar lamina viewed from the side not extending 

 ventrad a distance equal to the height of segment 9, the appendage 

 entire, its length at base more than half the length of segment 9. 



Measurements : total length, male 58, female 56 mm. ; length 

 of abdomen, male 39, female 40 mm. ; length of hind wings, male 

 37, female 36 mm. ; width of hind wings, male and female, 1 1 to 

 1 1.5 mm. 



Specimens examined in the Museum of Comparative Zoology. 



Measurements according to Walker as follows : total length, 

 male 52-55.5, female 58-62 mm. ; length of abdomen, male 37-39, 

 female 40-43 mm. ; length of hind wing, male 34-37, female 35.5- 

 38 mm. ; width of hind wing, male 9.4-10.5, female 10.5-11.25 mm. 



New England. — July 8-August 12. 



