354 



PSYCHE. 



[June iSgo. 



darker with two maculose narrow, very 

 angular stripes, whitish blue ; abdomen 

 long, slender, equal, very much arcua- 

 ted behind the inflated base in both 

 sexes ; browai spotted with blue ; seg- 

 ments 3-10 with two large, apical blue 

 spots, 3-7 with two basal blue spots ; 

 second segment with two blue lines 

 on each side ; appendages ( Z ) black, 

 moderate, a little incurved, folia- 

 ceous, the base narrow, finely denticu- 

 lated on the inner margin ; carinated 

 within, before the apex the carina is in- 

 flated and finely spinulose ; the rounded 

 apex has a very short, acute, incurved 

 spine ; inferior appendage one-half short- 

 er, elongately triangular, obtuse ; ap- 

 pendages (?) foliaceous, broad (only 

 the basal part is knowai). Genital parts 

 in the second segment ( 5 ) similar to 

 those of A. septentrionaUs, but the 

 outer spine of the anterior piece is long- 

 er than the hamulus, slender, the tip 

 sharp and curved dow'nwards ; hamuli 

 foliaceous, flat, cut straight on the tip ; 

 feet brown, black beneath; wings hyaline, 

 costa yellow ; pterostigma elongated, 

 fuscous; membranule brackish gray ; the 

 subnodal sector sometimes not bifurca- 

 ted ; 15-1S antecubitals, S-ii postcubi- 

 tals. Length 55-5S mm. ; alar expanse 

 78-83 mm. ; pterostigma 4 mm. 



Hab. Sitka, Alaska ; Saskatchewan, 

 Brit. Amer. 



I have seen three males and two 

 females. In my Synopsis an imperfect 

 female was described ; this species is 

 very similar to A. sepientrionalis but 

 differs in the genital parts of the male, 

 the longer connections of the eves, the 



color of the front, and the slender abdo- 

 men. Aeschna minor Rambur. quoted 

 in the Synopsis, p. 20, as very similar, 

 belongs to A. Janata ^?ty. 



II. Aeschna septextrionalis. 



Aeschna septoitrionalis Burm. 

 Handb., 1S39, v. 2, S39, 11. — Hagen 

 Syn. Neur. N. A., 120, 2. 



Blackish-brown, spotted with blue ; 

 head yellow in front ; anteriorly a nar. 

 row transverse line, superiorly a large 

 spot in the shape of a T ; the rhinariuni 

 and margin of the labrum black ; eyes 

 shortly connected ; occiput large, yel- 

 lowish, the hind border elevated, black 

 on each side ; thorax fuscous, dorsum 

 with two median elongated points ; sides 

 darker with two narrow, maculose and 

 angulated stripes, whitish-yellow ; feet 

 black, abov^e rufous ; abdomen long, 

 stoutish, narrowed behind the in- 

 flated base (3^), black, spotted with 

 blue ; last segment blue, with a broad 

 black median liand, scarcely reaching 

 the tip ; an elevated basal tootli above 

 (5) ; appendages brownish black, mod- 

 erate, a little incurved, foliaceous, the 

 base narrow^, a basal obtuse tubercle be- 

 neath ; carinated inwardly, apex obtuse 

 inflated in front ; inferior appendage one 

 half shorter, elongately triangular, ob- 

 tuse ; genital parts in the second segment 

 ( fi; ) with the anterior piece elevated ; 

 strongly depressed in the middle, with 

 a conical, straight, stout spine, as long 

 as the hamulus on each side ; hamuli fol- 

 iaceous, cut obliquely on the tip with the 

 outer angle rounded, the interior part is 

 bent up suddenly, large, triangularly 

 shaped on the base ; penis with a hook oii 



