5oO Mr. "VY. L. Distant on Homoptera. 



Tettigonia prolixa, Fowl. Biol. Coutr.-Am., Ehvnch. Horn. ii. p. 275, 



t. xviii. tig. 18 (1900). 

 Helocham commmiis (part.), Van Duz. Tr. Am. Ent. Soc. xxi. p. 280 



(1894) ; BaU (pai-t.), Proc. Iowa Acad. Sci. viii. p. 62 (1901). 



Walker is largely to blame for the confusion appertaining 

 to this species. In 1852 (List Horn. iv. p. 1156) he sank 

 his species as a synonym of Helochara coinmunis, Fitch. In 

 1858 [Joe. cit., Suppl. p. 235) he again removed it. The 

 real explanation seems to be that with his T. herb'ida he 

 mixed up specimens of H. communis. It is not a Xearctic 

 species, the unique type is -without locality, and the North- 

 American localities he gives are only applicable to the other 

 specimens he confused ■with his species. K. herbida is a 

 Neotropical species {cf. remarks under Helochara communis) . 



KoUa bifida. 



Tettigonia bifida, Say, Journ. Acad. Nat. Sci. Phil. iv. p. 313 (1831) ; 



Van Duz. Trans. Am. Ent. Soc. xxi. p. 273 (1894) ; Ball, Proc. Iowa 



Acad. Sci. viii. p. 58, t. v. fig. 1 (1901). 

 Tettixjonia tenella, Walk. List Horn. iii. p. 770 (1851), 

 ? Tef.tiyonia fasciata, Walk. loc. cit. p. 780 (1851). 



Ball {supra) adds, and no doubt correctly, T. fasciata, 

 Walk., as a synonym of bifida, Say. Walker's type is, how- 

 ever, not now to be found, and therefore some slight uncer- 

 tainty prevails. Its loss, however, causes no difficulty, as I, 

 at least, suggest that when no type of a Walkeriau species 

 exists, such species is no longer to be recognized, excepting 

 in a few cases Avhere no difficulty can arise as to its identity. 



Kolla geumetrica, 



Tettigonia qeometrica, Sign. Ann. Soc. Ent. Fr. 1854, p. 12, t. i. 



fig. 12; BaU, Proc. Iowa Acad. Sci. viii, p. 59, t. v. fig. 2 (1901). 

 Tettigonia psittacetla, Fowl. Biol. Centr.-Aon., Ehynch. Horn. ii. p. 290, 



t. xix. fig. 26 (1900). 



Ball states that this species occurs throughout all the 

 Southern United States from Maryland and Illinois south 

 to Florida and Texas, and on through ^Mexico to South 

 America. 



Kolla ithra, sp. n. 



Vertex, pronotum, and scutellum pale greenish ochraceous, 

 scutellum with a transverse black anterior marginal spot near 

 each basal angle ; body beneath and legs pale greyish ochra- 

 ceous ; tegmina purplish black, the claval area mostly pale 

 greenish ochraceous, the claval margins narrowly black, 



