228 PHILIP p. CALVERT. 



Metallic blue or green ; labiiun, two lateral thoracic stripes, pectus, venter of 

 1-7 or 8, black. Hind raarfjin of wings decidedly convex. 



% . Wings velvety black (gray or brown — teneral), no pterostigma. Venter of 

 8-10 whitish. Sup. app. with outer margin denticulated, apical half wider, bent 

 inwards and downwards, apex obtuse. Inf. app. one-fourth shorter, extreme 

 apex acute, bent inwards. 



9. Wings smoky, apical fourth sometimes darker; pterostigma white, of 6-12 

 cells; veins metallic ; 8 or 9-10 with a mid-dorsal longitudinal line and a spot 

 each side, whitish or yellowish. 



Abd. % 34-40, 9 30-41.5. Hind w. % 27-27.5, J 29-34.5. 



Common around Phila., along the banks of narrow streams, May 

 24 — Aug. 17 ; ovipositing June 28, July 6. 

 Quebec — Florida, west to Kansas and Texas. 



2. Calopteryx <liiui<liat». Burm. race apicalis Burm. 



C. a. Burmeister, Handb. Ent. ii, p. 827, 1839. Hagen, Psyche v, p. 246, 1889. 



Metallic greeu or blue; labium, head below, thoracic sutures, feet, abdominal 

 venter, black. A sharp tubercle on each side of rear of head. Wings narrow 

 hind and front margins parallel for a part of their length. 



%. Wings with apical sixth black, its inner border straight; no pterostigma. 

 Sup. app. similar to maculata. 



9 . WMngs hyaline; pterostigma absent, or very small and white, of 2-3 cells. 



Abd. I 35-37, 9 31-32. H. w. % 27, 9 29. 



Phila., 2 S 1 9 (Burmeister), 1 S , 1 9 (Uhler)— Hag. A e. 

 Massachusetts, New York, Delaware (Beutenmiiller, A. E. S.) 



2. Hetterina Hagen. 

 Hagen, Syn. Calopt. p. 30, 1853. Selys, Mon. Calopt. p. 96, 1854. 



3. Heta^riiia aiiiericana Fabr. 



Agrion a. Fabricius, Ent. Syat. Supp. p. 287, 1798. H. a. Walsh, Proc. Ent. Soc. 

 Phila. ii, pp. 211, 267, 1863. Agrion basalis Say, Harris Ins. luj. Veg. (Flint's 

 edit.) pi. 1, fig. 2, 1862. 



Head and thorax coppery red ( "J) ) or metallic green ( 9 ), or these sometimes 

 reversed. Thorax with a humeral and two lateral stripes, pectus, yellow. Ab- 

 domen metallic green, an interrupted, basal, yellow ring on 3-7. Tips of wings 

 unspotted ; pterostigma very small, yellow. Tibial superiorly pale. 

 C ^ ■ Basal fifth or sixth (except at front border of front wings) bright red, 

 sometimes replaced by reddish brown on hind wings, ^np. app. forcipated, 

 inner margin near middle with two tubercles, of which the more basal is the 

 larger, whose sides are convergent (the apical side longer) whose tip is obtusely 

 rounded, and whose surface bears no smaller tubercles; the other (distal) tuber- 

 cle has the basal side longer, its tip rounded ; apex of sup. app. obtuse. Inf. app. 

 reaching first tubercle of superiors, nearly straight, narrowing to the truncated 

 apex. 



9. Base and front margin of wings pale yellowish brown. Mid-dorsal tho- 

 racic carina sometimes yellow ; 1-10 with a narrow, interrupted, mid-dorsal, 

 yellow line. 



Abd. 1 34-37, 9 31. Hind w. % 25-30, 9 28. 



