No. 39] ODONATA OF CONNECTICUT: AESHNIDAE 175 



middle coxae ; median lobe with a closed median notch and hairy 

 distal margin; palpi with a sharp fixed hook (not truncate as in 

 Boyeria) ; antennal segments subequal in length, the first two and 

 distal half of 7 darker than the rest; compound eyes black, the 

 mesal angles separated by i mm. ; surface of the head behind the 

 eyes rugose, with two nearly circular glabrous spots behind the 

 mesal angles of the compound eyes and a smaller one on the mid- 

 dorsum ; caudo-lateral margins of the head angulate. 



Thorax : pronotum with flaring and rounded lateral margins ; 

 the procoxa with two blunt projections dorsad of each on the 

 pleura ; meso- and metapleura, dark brown ; legs conspicuously 

 banded, mostly dark brown, both femora and tibiae with three 

 light-colored rings ; tarsi each with a double row of forked spines 

 below, distal half or more of the second and third segments pale ; 

 wing-cases extending to the apex of abdominal segment 5, hind 

 femora when extended parallel to the body, reaching the caudal 

 margin of abdominal segment 5 in full-grown nymphs. 



Abdomen : dark brown with a paler, somewhat indefinite band 

 on mid-dorsum of 1-7, and a bilobed spot of the same color on 9 

 and 10; spines on lateral keels of segments 5-9 inclusive; ventral 

 terminal appendages with a little more than the basal half brown, 

 the tips also brown, remainder pale ; superior appendage a little 

 more than half as long as the ventrals, the laterals about two- 

 thirds as long as the superior. 



Measurements ; mature nymph : total length, 29-32 mm. ; 

 length of abdomen, 17-19 mm.; greatest width, 7 mm.; length of 

 hind femora, 5 mm. ; length of median lobe of labium, 5-5.5 mm., 

 width, 2.5-4 mm. 



Immature Nymphs : total length, 24-26 mm. ; length of abdo- 

 men, 10-13 mm.; greatest width, 5.5-6 mm.; length of hind 

 femora, 4.5 mm. ; length of median lobe of labium, 5 mm. ; width, 

 2-3.5-4 mm. 



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



Head : brown, front yellowish, pilose above and with a T-spot ; 

 compound eyes contiguous for about i mm. ; occiput and post- 

 genae brown, pale on sides. 



Thorax: mesothorax brown, with obscure greenish or grayish 

 areas above, the mesepimera each with a yellow stripe measuring 

 4 mm. by less than i mm., the metepimera with a similar stripe, 

 both surrounded by very dark brown or black ; legs brown, tarsi 

 almost black ; femora with two rows of short sharp spines beneath, 

 tibial spines a trifle longer than the intervals between; wings (PI. 

 VIII, Fig. 4) flavescent, extreme bases brown ; front wings with 

 II to 14 postnodal cross-veins. 



Abdomen : brown in dried specimens, marked with green ; blue 

 in fresh ; third segment narrowed at middle, lateral margins of 

 tergum 2 extending ventrad, forming a thin plate on each side of 

 the accessory appendages ; anal appendages as in Fig. 24, No. 6, 



