138 ENTOMOLOGICAL NEWS. [June, 



type is lost, undoubtedly belongs to Neotettix, but being 'in doubt 

 about its specific position in my table of species it is simply ap- 

 pended at the end. 



Genera of Tettigia of North America. 



Anterior femora more or less compressed, carinate above; antennas 12-14 

 articles . . . Tettigiae. 



1. (4) Pronotum with the front border anteriorly angulate produced, 



median carina strongly cristiform, arched longitudinally, median 

 lobule of posterior lateral lobe small; vertex in profile angulate 

 produced . . ... Gen. i. Nomotettix Morse. 



2. (3) Vertex in profile rounded anteriorly, a little advanced in front of 



the eyes; frontal costa strongly forked; median carina of pro- 

 notum distinctly elevated, more or less convexly curved longitu- 

 dinally, not cristiform . . . Gen. 2. Neotettix gen. nov. 



3. (2) Vertex equal to or narrower than one of the eyes, not produced 



in front of them,' truncate anteriorly . Gen. 3. Paratettix Bol. 



4. (i) Pronotum generally not advanced upon the head to the eyes, 



median lobule of posterior lateral lobe usually well developed; 

 vertex in profile anteriorly angulate, projecting beyond the eyes. 



Gen. 4. Tettix Charp. 



Neotettix gen. nov. 



Frontal costa strongly forked, median lobule of posterior lat- 

 eral lobe of pronotum but slightly developed; vertex in profile 

 rounded anteriorly, from dorsal view wider than one of the eyes. 

 Pronotum advanced upon the head to the eyes, median carina 

 elevated, more or less arched longitudinally, dorsal front margin 

 truncate, or scarcely angulate, dorsum transversely tectiform or 

 convexed; hind femora broad, rather stout. Species small, with 

 antennae consisting of 12-13 articles. Type, Tettix femoratus 

 Bolivar (not 7ettix femoratus Scudder). 



Members of this genus recall brachypterous forms of Paratetti. v, 

 to which they seem to have a closer affinity than to either the 

 Nomotettix or Tettix series. The crown of the head is posteri- 

 orly mammillate. Representatives can be distinguished from 

 Paratettix by the character of the vertex, which is wider than 

 one of the eyes and is not truncate anteriorly. The Tettix group 

 has one or two additional antennal joints, the pronotum is not 

 advanced upon the head to the eyes, while the species comprising 

 the Nomotettix group have the pronotum distinctly cristiform, 

 besides the vertex in profile appears angulate anteriorly. Not 

 the least important distinction is the sudden widening of the 



