100 PROCEEDINGS OF THE ACADEMY OF [March, 



open short-leaf pine woods, at Rosenberg in open park-like country 

 with scattered huisache trees {Vachellia farnesiana) , and at Lane 

 it occured in high grasses in long-leaf pine woods, where the species 

 was locally abundant. 



The earliest date we have for adults of the species is June 30 

 (Shovel Mountain), from which locality we have a fairly regular 

 series of dates until September 18. By far the greater proportion 

 of our dates are in August. One male from Keokuk, Iowa, was 

 taken as late as October first. We have no nymphal material of 

 the species, having secured adults only in our collecting. The 

 species is the earliest maturing form in the eastern states, appar- 

 ently having past its seasonal greatest abundance before August. 



Remarks. — In the past this species has been universally confused 

 with maculipennis, or at least with certain phases of that species, 

 and its present recognition is largely due to the fact that the chro- 

 mosome differences of the two species were recognized by Dr. C. 

 E. McClung, who called our attention to the two forms. The ex- 

 ternal morphological differences separating them may seem trivial, 

 particularly in view of the known variability of coloration and fas- 

 tigial features in this genus, but the more one analyses these di- 

 agnostic features the more evident becomes their taxonomic im- 

 portance in the present instance. The fastigium is broader, shorter 

 and blunter than in maadipennis, and from the side more strongly 

 rounded, while the median carina of the dorsum of the same is also 

 well indicated in the male. The pronotal disk is of a different 

 shape, with its caudal margin more angulate and less rounded. 

 The absence of the subcostal stripe in the male is invariable in the 

 large series now before us, and in addition the species generally 

 has a more decided and richer green and a clearer, more transpa- 

 rent red brown in its coloration than the other species. 



We feel no uncertainty relative to the determination of the spe- 

 cies. 



Specimens examined •.^'^ 225, 144 cf, 819. 



North Carolina: Havelock. 



South Carolina: Lane, Williamsburg County; VII, 20, 1917; 

 (M. Hebard; locally abundant in high grasses in long-leaf pine 

 woods); 33 d', 13 9 ; [Hebard Cln.]. 



Georgia: (H. K. Morrison) 6 d', 3 9 ; [M. C. Z. and U. S. 

 N. M.]." Billy's Island. 



^^ Localities previously recorded by the author or Rehn and Hebard are listed 

 without comment. 



*^ Portion of material reported by Scudder. 



