ORTIIOPTERA OF INDIANA. 229 



turn and inner wings vary much in length in the same species, mucli 

 confusion of synon3miy having therefore resulted. Eight nominal 

 species have been described from the United States. Of these four 

 occur in Indiana. 



KEY TO INDIANA SPECIES OF TETTIGIDEA. 



a. Front margin of the pronotum proclucecl on the head and between the 

 eyes nearly to their front in the form of an acnte angle or sharp 

 cusp. 



h. Body rather stout; vertex but little projecting beyond the eyes; 

 the pronotum broad across the shoulders, its dorsal surface 

 strongly rugose or wrinkled, its median and lateral carinse 



well developed 25 armata, p. 229 



hh. Body slender; vertex more projecting, the pronotum narrow 

 across the shoulders, its dorsal surface finely wi'inkled, its 



carinpp but slightly developed 26 spicata, p. 230 



aa. Front margin of pronotum obtuse angulate or rounded, produced on 

 the head only to front of posterior third of eyes. 



c. Vertex of head rather strongly advanced in front of eyes, 

 the union of its median carina and frontal costa, prom- 

 inent; front margin of pronotum obtuse angulate; eyes of 



average size; antennae stout 27 parmpennis, p. 230 



cc. Vertex of head but little produced in front of eyes; the 

 union of its median carina and frontal costa less prom- 

 inent; front margin of pronotum l)roadly rounded; eyes 

 prominent, antennae more slender 28 lateralis, p. 231 



25. TettictIdea armata Morse. 



Telligidea armata Morse, 9 6, HI, 1875, 107; Bl., 15, XXX, 1898, 60; 



Scudd., 18 8, 1900, 18; Hanc, 6 9, 1902, 142, Plate X, Fig. 6. 

 Tettigidea armata depresm Morse, 9 6, III, 1895, 107; Bl., 15, XXX, 



1898, 60; Hanc, 69, 1902, 142. 



Color dark gray or brown above, blackish on the sides, the tegmina 

 with a white spot on their apical third; the hind femora usually more 

 or less mottled with whitish on their outer face. Body rather robust; 

 vertex but little projecting beyond the front of the eyes; the frontal 

 costa, when viewed from the side, prominent. Pronotum with its 

 front dorsal margin projecting forward between the eyes in the form 

 of an acute tooth or cusp; its median carina distinct, sharp, nearly 

 horizontal, its dorsal surface distinctly roughened with rather long 

 wrinkles, the sides in front of the shoulders a little exc'avated. In 

 the long form the wings and pronotum pass the hind femora. In the 

 short form, T. armata depressa, the pronotum is abbreviated and the 

 wings more or less abortive. 



Measurements: Length of, body, long form, male, 11 mm., female, 

 15 mm.; of pronotum, male, 11.5 mm., female, 14 mm.; of hind fe- 



