524 



Length of abdomen, 5 28 mm. 



Length ol' a})domcn, $ 2't mm. 



Length of hind wings, £ li) mm. 



Length of hind wing.s, 9 19 mm. 



AVidth of hind wings, i 4 mm. 



Width of hind wings, 9 4 mm. 



A relatively rare species which lias not Ijcen collected outside of 

 Champaign County. The nymphs are to be found in the same locality 

 where c.vsiilaiis is abundant and the two are frequently taken together. 



Enallagma ASi'EHSUM (Hagcn) 



Nymph. — Unknown. 



Adult; Male. — Color, blue and black. 



Head blue and black; mouth-parts buff, the median lobe subtrian- 

 gular and with a shallow acute cleft; ])alpi narrow, the distal segment 

 pale ; antennae black ; postclypeus black, anteclypeus and the la])rum 

 brown or buff and a blue transverse stripe above the clypeus to the level 

 of the antennal fossae ; remainder of the front and vertex black ; post- 

 ocular spots I)lue, tlie blue connected with the blue of the occiput and 

 postgenae. 



Thorax blue anil black ; ])ronotum black except the narrow cephalic 

 lobe, which is blue ; procpimera black above, blue or pale below ; meso- 

 stigmal plate narrow and about half blue; mesothorax with a broad 

 dorsal stripe, covering the carina and also half of the mesosupraepi- 

 sterna on either side; this is followed by a blue stripe which occupies 

 most of the remaining portion of the mesosupraepisternum ; meso- 

 pleural suture covered with a I)lack strijie wliicli is considerably 

 widened near the caudal margin of the mesiiifraepisternum and extends 

 cephalad over that sclerite, covering the dorsal half or third ; remainder 

 of the thorax blue or buff; paraptera entirely black; legs black and 

 buff, the coxae and the trochanters pale, the femora with a stripe on' 

 the cephalic surfaces including one row of setae ; tarsi and claws black, 

 shining ; wings with nine postnodal cross-veins irv the front wing and 

 eiglit in the hind wing; M._, arising between the fourth and fifth post- 

 r.odal cross-veins in the front wing and between three and four in the 

 I'ind wing. 



Abdomen blue antl I)lack ; terga mostly blue, but a very narrow- 

 basal spot on the first tergum, a dorsal apical spot and ring on the 

 second, tiie apical tiiree-fourths of the dorsum of tiie third, dorsum 

 of the fourth, all of five and six except narrow basal rings, the pro.ximal 

 half of seven, and all of the dorsum of ten, are black; lateral margins 



