No. 39] ODONATA OF CONNECTICUT! AESHNIDAE 1 73 



Thorax : pronotum with the lateral margins flaring considerably, 

 and rounded ; two long; heavy spines above the procoxae ; legs 

 mostly brown, the femora and tibiae each with two narrow pale 

 rings ; third tarsal segment pale at base ; wing-cases extending to 

 the middle of abdominal segment 2 (young nymph). 



Abdomen: flat below, without dorsal spines, but with lateral 

 spines on segments 5-9, those on 9 more than half as long as seg- 

 ment 10; anal appendages brown with pale tips, extreme tip, how- 

 ever, brown; the superior appendage bifid at tip and nearly as 

 long as the ventral appendages ; lateral appendages one-fourth as 

 long as the ventral; a small but conspicuous pale mesal spot on 

 the dorsum of tergum 8, 



Measurements: total length (immature nymphs), 25 mm.; 

 length of abdomen, 15 mm. ; hind femora, 4 mm. ; length of meta- 

 thoracic wing-cases, 3 mm. 



Described from nymphs obtained in a small stream at Orange, 

 Conn., by the writer. The superior anal appendage is said to be 

 entire in some specimens. 



Adult, male. — Color dark brown, marked with green and yellow. 



Head : labium, labrum, clypeus and front yellow or butf ; rear 

 of head and vertex yellow; line of contact of the eyes 2 mm. in 

 length. 



Thorax: robust with a dorsal green stripe on each side that is 

 more or less obscure in dried specimens, the mes- and metepimera 

 each with a bright yellow spot about i mm. in diameter, slightly 

 cephalad of the middle of the sclerite ; legs entirely brown ; second 

 segment of trochanters with a polished area and one or two short 

 spines beneath ; femora with two ventral carinae thickly studded 

 with short subequal spines ; middle tibia sometimes with a few 

 scales at tip; distal segment of tarsi as long or longer than the 

 two proximal ones together ; tarsal claws with ventral tooth placed 

 at or slightly beyond the middle; wings (PI. viii. Fig. i) flaves- 

 cent throughout, darker at extreme base; hind wings with an 

 anal triangle composed of 5 cells. Antenodal cross-veins 23-24 

 in the front wing and 16-17 in the hind wing; basilar space with 

 4-6 cross-veins, supertriangular space with 3-5 ; the triangle with 

 5-6 cells ; Rs without a distinct fork, the supplementary radius 

 distinct to the margin of the wing; supplementary media also 

 very distinct and traceable to the margin. 



Abdomen: uniform brown; third segment greatly narrowed; 

 conspicuous transverse furrows on terga 2-8; terga 3-8 with dis- 

 tinct dorsal and lateral carinae; auricles of segment 2 flaring con- 

 siderably and with numerous (more than 20) small teeth on the 

 ventral margins ; genital lobes of second segment with small teeth 

 on the ventral margin, and a lateral depression on each ; superior 

 anal appendages with a ventral tooth at base, and a dorsal carina ; 

 apices blunt, the appendages widest considerably beyond the 

 middle; superior anal appendages 4.5 mm. long, by .8 mm. wide, 



