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



Head : labium, labrum, clypeus, and most of the front white ; 

 area surrounding ocelH, and a somewhat semicircular area in front 

 of ocelli and short lines extending ventrad along the margins of 

 the compound eyes, dark metallic green ; occiput pale ; postgenae 

 black, shining; labrum, clypeus, front, vertex with black hairs; 

 the hairs on occiput pale ; compound eyes green in life. 



Thorax: prothorax uniform black, the caudal margin bilobed; 

 meso- and metathorax with silken pilosity, dark brown or green 

 to black with yellow markings as follows: mesanepisternum with 

 a short longitudinal line not reaching either margin of the sclerite ; 

 and another, sometimes interrupted line above the mesopleural 

 suture ; katepisterna black or brown, pale below ; mesepimerum 

 with a pale stripe from wing bases to a point just cephalad of the 

 spiracles and the metepisternum with a similar stripe extending 

 well onto the anepisternum ; metepimerum almost entirely yellow 

 except the brown dorsal and cephalic borders. Coxae and tro- 

 chanters sometimes light brown, the remainder of the legs black; 

 claws with ventral teeth shorter than half the length of the claw 

 beyond the tooth; wings as in PI. xiv. Fig. i. 



Abdomen : uniform black or dark brown, almost completely 

 pollinose in older specimens, pale below, especially on the anterior 

 segments and on sides of terga 1-3; anal appendages black; 

 hamules large and flat when viewed from below, with a small hook 

 on the cephalo-mesal margins. 



The wings show variation in the amount of infuscation, espe- 

 cially in the area just beyond nodus. 



Female. — Head similar to that of male ; thorax in general some- 

 what paler in color, especially the prothorax, in which the caudal 

 and cephalic margins are pale and there is sometimes a median 

 spot on the notum. The abdomen differs in having longitudinal 

 yellow stripes on each side of the dorsal carina, which are com- 

 posed of dashes beginning on caudal half of segment 2 and 

 extending to segment 7; lateral margins of terga 1-5 yellow, the 

 pale color decreasing in width from the first to fifth; venter 

 entirely pale; superior anal appendages black, inferior brown. 



Measurements : total length, male 34-40, female 28-35 "^"^- > 

 abdomen, male 21-24, female 17.5-22 mm.; length hind wing, 

 male 27-30, female 25-29 mm. ; width hind wing, male 8, female 

 9-10 mm. 



Connecticut.— New Haven, 20 July, 1908 (B. H. W.) ; Guilford, 13, 

 27 July, 1920 (P. G.) ; East Haven, 4 July, 1921 (P. G.). 

 New England.— June 7-September 9. 



Genus Leucorrhinia Brittinger 



Nymph. — Head: labium with 10- ii palpal setae and 13 mental 

 setae ; abdomen with dorsal hooks on segments 3-8, lateral spines 

 on segments 8-9 ; superior anal appendages not decurved. 



