174 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [Bull. 



bluntly pointed, rather sparsely setose with long black setae mesad 

 of the dorsal carina; a short ventral tooth present within one mm. 

 of the base; inferior appendage triangular, 1.5 mm. long by i mm. 

 wide at base, the tip blunt and with two rounded recurved projec- 

 tions. 



Female. — Similar to the male in color ; anal appendage 3.5 mm. 

 long, bluntly pointed and flat ; widest beyond the middle ; ovi- 

 positor extending beyond the caudal margin of the ninth segment, 

 the narrow lateral plates more than half the length of that seg- 

 ment; lateral valves each with a feeble lateral keel, and not 

 pointed at the base of the styli ; styli .75 mm. long, much shorter 

 than the dorsum of segment 10. 



Measurements : total length, male 60-63, female 62-65 mm. ; 

 length of abdomen, male 45, female 47 mm. ; length of hind wings, 

 male 41-42, female 45 mm.; width of hind wing, male 12, female 

 14 mm. 



Connecticut. — Kent, 31 August, 1904 (W. E. B.) ; North Branford, 

 18 September, 1915 (G. A. F.) ; Litchfield, 15 May, 1915, 6 June, 1925 

 (L. B. W.). 



New England. — May 15-September 26. 



Genus Basiaeschna Selys 



Nymphs. — Caudo-lateral margins of the head angulate; labial 

 palpi not truncate at apex ; abdomen with lateral spines on seg- 

 ments 3 or 4-9 ; hooks present on dorsum of abdomen. 



Adults. — Wings with upper section of arculus as long as the 

 lower ; M^ not making a sharp bend at distal end of stigma ; Rs 

 not forked, and i to 3 rows of cells between it and the supple- 

 mentary sector ; triangle and supertriangle with cross-veins ; 

 basilar space free or with a single cross-vein; anal loop of about 

 6 cells ; cubito-anal cross-veins 3 to 4 ; anal angle of hind wings 

 dissimilar in the two sexes, the anal triangle of the male with 2 

 cells; thorax not uniform green; abdomen with a single lateral 

 carina per segment on each side ; inferior anal appendages of male 

 entire. 



The nymphs of this genus are very common about New Haven 

 and may be found either in small streams or woodland ponds. 

 They are apparently much more common than the adults and it 

 is possible that they may have some of the same habits of dispersal 

 as are found in the Gomphidae. The nymphs are climbers like 

 other Aeshnidae. Needham (1901, p. 466) has described the pro- 

 cess of oviposition, and he states that the eggs are deposited in 

 neat double rows in the submerged leaves of bur-reed and 

 Sparganium. 



Basiaeschna Janata Say 



Journal of the Academy of Natural Sciences of Philadelphia, 13 : 1839. 



Nymph (PI. iii, Fig. 3 ; Fig. i). — Color light and dark brown. 



Head: labium (PI. vi, Figs, i and 7) extending between the 



