No. 39] ODONATA OF CONNECTICUT : COENAGRIONIDAE 93 



broad enough on the seventh and eighth terga to fuse on the 

 meson, though sometimes interrupted on the various segments, 

 forming a series of exclamation marks ; lateral surface of tergum 

 9 and all of 10 buff. 



Measurements: total length, male 32, female 31-33 mm. ; length 

 of abdomen, male 24-27, female 24-26 mm. ; length of hind wings, 

 male 20, female 20-22 mm. ; width of hind wings, male 4, female 

 5 mm. 



Connecticut. — Orange, 21 July, 1905 (W. E. B.) ; Portland, 8 August, 

 1913 (B. H. W.) ; Guilford, 1.^ July. 1920; Twin Lakes, 20 August, 1921 ; 

 Hamden, 3 August, 1920 (P. G.) ; New London, 8-22 June. 1921 (R. H. H.). 



New England. — June 6-September 26. 



The species tibialis and apicalis do not occur in New England, 

 but may be distinguished from the species herein described by the 

 following: Nymphs of tibialis and apicalis have long ovate gills 

 coarsely spotted with dark pigment and usually with a pale trans- 

 verse stripe. Female adults of tibialis and apicalis are charac- 

 terized by the lack of caudal projections on the mesostigmal plates 

 (tibialis) or a very short pointed projection at the caudo-mesal 

 angles (apicalis). The males are not easily distinguished, but 

 differ in the anal appendages and color of the thorax and abdomen. 

 Tibialis is perhaps most closely related to translata, but may be 

 distinguished by the greater amount of pale color on the sides of 

 the thorax and the different anal appendages. Apicalis is a much 

 lighter colored species than translata and possesses considerable 

 blue pigment. 



Argia fumipennis is a southern species with clouded wings. 



Subfamily Lestinae Needham 



The nymphs have long slender bodies and are furnished with 

 characteristic gills (PI. i, Figs. 1-6). The mentum is frequently 

 contracted at the proximal end, much more so than in the 

 Coenagrioninae. 



This family is represented in Connecticut by a single genus, 

 Lestes. In addition to characters stated in the key, the presence 

 of long tibial spines, which are much longer than the intervals 

 between their bases, is important. Only two other genera are 

 known from the United States, one of which is tropical in its 

 distribution, the other occurring in the Rockies and far west. 



The different members of the genus Lestes, the only representa- 

 tive of the subfamily, are all pond or small-lake species and their 

 nymphs may be found often in considerable abundance among the 

 weeds bordering these places. The adults of the species with 

 brown thoraces such as forcipatus and disjunctus, are frequently of 

 retiring habit and well protected by their coloration. The adults 

 of the brighter species such as inaequalis, uncatus and vigilax, 

 however, love the open and may be found skimming near the 



