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



Dorocordulia lepida (Hagen) 



Bulletin de rAcademie royale . . . de Belgique (2), 31: 264: 1871. 



Nymph. — Head: labium with 10 to 11 setae on each side of the 

 mentum; labial palpi with 7 setae on each side, that on the base 

 well separated from the remaining setae; teeth of the distal 

 margins of the palpi shallow and provided with two to three spines 

 each. 



Abdomen: dorsal hooks on segments 5 to 9 inclusive; lateral 

 spines on segments 8 and 9. 



Measurements: total length, 19 mm.; length of abdomen, 10 

 mm. ; length of metathoracic wing-cases, 5 mm. ; length of hind 

 femora, 6 mm. 



A nymph seen in the collection of William T. Davis, from which 

 the measurements were taken, and a labium received through the 

 courtesy of Dr. R. H. Howe — both reared specimens. 



Adult, male. — Color metallic green, black and yellow. 



Head : labium brown ; labrum black, anteclypeus brown ; post- 

 clypeus and front green except the sides of the front below the 

 antennae, which are brown ; postocular triangle brown, occiput 

 and postgenae black. 



Thorax: metallic green, pilose, and obscurely marked with 

 yellow and black ; legs mostly black, the front femora and coxae 

 brown ; wings clear, yellow at base ; postnodal cross-veins of the 

 front wing 5, stigma black, supported by one cross-vein. 



Abdomen: black, obscurely marked with yellowish brown on 

 the sides of terga i and 2 ; anal appendages black, accessory 

 appendages similar to those of Cordulia. 



Female. — Color similar to the male. 



Abdomen: yellow on sides of tergum 2, nearly all of 3 yellow, 

 and yellow triangles on 4-7; vulvar lamina consisting of two 

 rounded lobes, extending one-third to one-half the length of the 

 segment from its base ; anal appendages black, the superiors about 

 as long as segment 9. 



Measurements : total length, male 2>7y female 37 mm. ; length 

 of abdomen, male 25-26, female 27 mm. ; length of hind wings, 

 male 27-28, female 28-29 mm. ; width of hind wings, male 8-9, 

 female 9-10 mm. 



Connecticut. — New London, 16-22 June, 1921 (R. H. H.) ; Litchfield, 

 31 August, 1913 (L. B. W.). 



New England. — May 22- August 31. 



Dorocordulia libera (Selys) 

 Bulletin de I'Academie royale . . . de Belgique (2), 31: 263: 1871. 

 Nymph. — Color dark brown, with darker stripes, resembling in 



general form the Somatochloras. 



Head : with prominent black transverse band between the eyes, 



above which is a lighter band about half as wide; antennae with 



