No. 39] ODONATA OF CONNECTICUT: COENAGRIONIDAE I03 



Lestes rectangularis Say 



Journal of the Academy of Natural Sciences of Philadelphia, 8 : 34 : 1839. 



Nymph. — Color buff or green. 



Head: wider than long, caudo-lateral margins of the head 

 without or with few setae ; labium extending between the meta- 

 coxae ; mental setae usually 6 ; lateral 3. 



Thorax : legs with rows of spines, the apices of the femora 

 fuscous and with a subapical dark ring; apices of the tibiae and 

 distal half of the third tarsal segment fuscous. 



Abdomen : lateral keels with apical spines on 5-9 ; sterna with 

 a double row of median apical spots, two to each segment ; seg- 

 ment 10 hairy beneath ; gills similar to those of forcipatus, usually 

 brown, sometimes nearly black, and with at least 3 cross-bands 

 on each. 



Measurements: length, 22 mm.; length of abdomen, 17 mm.; 

 length of gills, 9.5 mm. ; width of gills, 2.3 mm. ; length of 

 median lobe, 4 mm. ; width of median lobe, .5-2.0 mm. 



Adult, male. — Color dark brown (metallic bronze) to black, 

 and sulphur yellow. 



Head : brown and yellow, labium pale ; antennae brown ; post- 

 clypeus dark brown, sometimes metallic; anteclypeus, labrum, 

 exposed portion of the mandibles, their trochantins and the genae 

 yellow ; front and vertex dull brown or bronze, nearly black ; 

 occiput and postgenae black, pollinose with age. 



Thorax : brown and yellowish ; pronotum yellowish buff, the 

 cephalic lobe with a median brown spot, the median lobes each 

 with an irregular H-shaped mark, which may cover most of the 

 lobe; anepisterna of the mesothorax each largely covered by a 

 brown longitudinal stripe; pale stripe of the mesopleural suture 

 widest near the pronotum, narrowed near the wing bases and 

 often bluish in color ; mesepimera with longitudinal brown stripes 

 from caudal margin to cephalic shoulder, widened and in contact 

 with the mesopleural suture adjacent to the wing bases, narrowed 

 cephalad and coming to a rather abrupt end on the cephalic 

 shoulder; margins of the stripe irregular; metepisterna pale 

 yellow with a triangular brown spot on caudo-dorsal angle; 

 remainder of the pleura and the intersternum yellow or buff ; legs 

 striped ; tarsi and claws brown, the dorsum of the tarsal segments 

 usually yellow; front wings with ii to 15 postnodal cross-veins 

 Mo arising between the third and fifth in the front wing, and 

 between the second and fourth in the hind; stigma surmounting 

 slightly more than two cells in both wings. 



Abdomen : brown and yellowish, sometimes faintly metallic, 

 long and slender; terga i and 2 brown on dorsum, pale on the 

 sides, the stripe on 2 contracted near the middle or completely 

 interrupted ; terga 3-7 with yellow lateral margins ; narrow basal 



