No. 39] ODONATA OF CONNECTICUT: LIBELLULIDAE 231 



sometimes with a clear yellow basal spot, which may extend beyond 

 the anal triangle. 



Abdomen : greenish black, with dull yellow as follows : a spot 

 on sides of segment i, sometimes two spots on segment 2, some- 

 times coalescing, and a pale apical ring on segment 3, with indefi- 

 nite spots on the cephalo-ventral angles ; terga 4 to 10 entirely 

 black; anal appendages (Fig. 58) similar to forcipata except for 

 the broken lateral margins in dorsal view and the absence of a 

 subapical inferior tooth in lateral profile. 



Fig. 58. Somatochlora kennedyi, 

 anal appendages of the adult. 

 (From Howe.) 



Female. — Vulvar lamina (Fig. 58) entire, Httle contracted at 

 tip, broadly rounded. 



Measurements : total length, male 54-58 mm. ; length of abdo- 

 men, male 35-39, female 34-38 mm. ; length of hind wings, male 

 30-31, female 30-32 mm.; width of hind wings, male and female, 

 8-10 mm. 



New England. — August i-September 8. 



Group 6. The Alpestris Group 



Somatochlora albicincta (Burmeister) 



Handbuch der Entomologie, p. 847: 1839. 



Nymph (Fig. 59). — Hinge of labium reachijig nearly to the 

 hind margin of the middle coxae; mental setae 11 or 12, the fourth 

 or fifth from the outside longest, the inner three or four very 

 short ; lateral setae of the palpi 5 or 6 ; crenulations 7 to 8 each 

 with 3 or 4 setae in a graded series. 



Abdomen : slightly wider than the head ; covered evenly above 

 with minute hairs among which are sparsely scattered longer ones, 

 the hind margin of each tergite with a fringe of short setae, 

 shorter than those of the general surface, with longer and more 

 slender hairs scattered among them, sometimes in small irregular 



