256 PHII.IP p. CALVERT. 



Abundant around Phila., June 1 — Sept. 10; ovipositing July 3. 

 New York and Ontario to Virginia, west to South Dakota, Kansas 

 and Texas (Cheney, Trunjan, Owen, A. E. S.). 



B. No hroicn basal band of the entire width of the wings. 



a. Wings unspotted at base ; pterostigma unicolorous, red or yellow. 9 with 



lateral margins of 8 produced ventrally ("perfoliate"). 



Libelliila auripeiinis Bm-meister. 



L. a. Burm., Handb. Eiit. ii. p. 861, 1839. Scudder, Proc. Bost. Soc. N. H. x, p. 

 191, 1866. 



Yellowish (teneral), through yellowish brown to red; a mid-dorsal yellow 

 thoracic stripe (teneral); abdomen posteriorly with a mid-dorsal black stripe. 

 Wings with a yellowish or reddish tinge, especially along front margin, extreme 

 apex sometimes brownish. Pterostigma yellow or red. 



Abd. I 34.5-40, 9 31-36.5. H. w. -^ 36-43, J 36-41.5. 



On and near the sea-coast from New York to Texas ; Ohio, Cuba, 

 Isle of Pines. 



b. Wings with dark basal markings, when present, in the form of a narrow 

 streak confined to the space between the subcostal and median veins ; pterostigma 

 blackish brown, or hicolored, yellow and blackish brown. 9 toith 8 perfoliate. 



liibelliila pltiiubea Uhler. 



L.p. Uhler, Proc. Ac. Phila, 1857, p. 87. Hagen, Syn. Neur. N. A., p. 157, 1861. 



Frons and lips yellowish brown or olive. Thoracic dorsum and a stripe ou 

 second lateral suture, reddish brown ; a median dorsal thoracic stripe and the 

 sides yellow. Abdomen yellowish, a mid-dorsal stripe on 2-10. Wings with 

 front margin yellowish, a brown basal streak between subcostal and median veins 

 out to the tirst or second antecubital. Pterostigma yellow, darker at distal end. 



%. Face and labrum blackish brown, thorax and abdomen pruinose dorsally, 

 in older males. 



9. Apex of wings from beneath the pterostigma dark brown. 



Abd. % 31, 9 29. H. w. % 36-38.5, 9 38-39. 



New York to South Carolina (Beuteniniiller, Skinner, L. O. Pat- 

 terson, C). 



48. Liibelltila cyanea Fabriciu.s. 



L. c. Fabr., Syst. Ent. p. 424, 1775. L. quadrupla Say, Jour. Ac. Phila.. viii, p. 

 23, 1839. Hagen, Syn. Neur. N. A., p. 157, 1861. 



Yellow; thoracic dorsum, a mid-lateral thoracic stripe, a mid-dorsal stripe on 

 2-10, brown ; a yellow mid-dorsal thoracic stripe. Wings with base and front 

 margins yellowish, a dark brown basal streak as in plumhea. Pterostigma dis- 

 tinctly bicolored, inner half yellow or white, outer half dark brown. 



%. Face and lips blackish, thorax and abdomen blue pruinose in old males. 



9. Apex of wings from distal end of pterostigma brown. In old females the 

 brown encroaches much on the yellow of the thorax. 



Abd. % 27.5-30.5, 9 24.5-28. H. w. % 33-37, 9 32-36. 



