88 CONNECTICUT GEOL. AND NAT. HIST, SURVEY [BulL 



Argia bipunctulata (Hagen) 



Synopsis of the Neuroptera of North America, 90: 1861. 



Nymph. — Unknown. 



Adult, male. — Color very light blue and black. 



Head : labrum blue with mesal spot on the caudal margin ; 

 clypeus bhie with a black spot on each side of the postclypeus; 

 genae and front to the antennae blue ; vertex black with pale post- 

 ocellar stripe and a small spot cephalo-laterad of each lateral 

 ocellus ; rear of head black on each side of the occipital foramen, 

 pale next the eyes and above. 



Thorax : pronotum black ; median lobe with a spot on each side 

 near the lateral margin, the lateral angles of the caudal lobe also 

 pale, propleura mostly pale; mesothorax with a narrow pale 

 stripe on the mesepisternum, the stripe about half as wide as the 

 black stripe below the mesopleural suture; metapleural suture 

 lined with black and with a spot near wing bases ; remainder of 

 pleura and sterna pale ; legs with pale dorsal carina on the femora, 

 the latter largely black above; tibiae black or brown below, pale 

 above ; tarsi and claws dark brown to black ; wings with stigma 

 surmounting a single cell, and M^ arising between the fifth and 

 sixth postnodal cross-vein in the front wings and between the 

 fourth and fifth in the hind. 



Abdomen : tergum i pale, black at base ; 2 blue, with two 

 dorsal spots near the caudal margin and an apical ring black; 3 

 blue, with caudal fourth black, the black surrounding a small pale 

 spot on each side, 4 and 5 blue, with caudal third black ; 6 and 7 

 black, with blue basal spots; 8, 9 and 10 blue, 10 with brown in 

 the sides ; anal appendages dark brown, the superiors entire, 

 inferiors with ventral arm hardly longer than the dorsal, the 

 ventral pale at tip; a pale-blue bifurcate process between the 

 superiors. 



Female. — Blue color replaced by yellow, darker than the male 

 in general appearance. 



Thorax : with the black stripe below the mesopleural suture 

 continuing to the wing bases, not separating from the suture near 

 the cattdal end as in apicalis. 



Abdomen : terga mostly black ; i and 2 with sides pale ; 3 and 

 4 with lateral pale stripes about three-fourths the length of the 

 segment, the black of the dorsum extending to the lateral margins 

 at the apex of each and enclosing there a small yellow spot ; 5 with 

 basal ring and lateral basal pale stripes half the length of the 

 segment ; 6 and 7 black with pale basal rings ; 8 pale above, black 

 on the sides ; 9 and 10 entirely black. 



Measurements : total length, male 26, female 28 mm. ; length 

 of abdomen, male 21, female 22 mm. ; length of hind wings, male 

 14-15, female 16 mm. 



