280 REPORT OF STATE GEOLOGIST, 



front margin Irnncate, or scarcely angulate, but little produced for- 

 ward upon the head, reaching to end of abdomen in short-winged 

 forms and much beyond it in long-winged forms of the same species; 

 the upper lateral notch or sinus nearly as deep as the lower. Eleven 

 species of .the genus have been described from the United States, five 

 of which arc known to occur in Indiana. These may be distinguished 

 by the following 



KEY TO INDIANA SPECIES OF TETTIX. 



a. Median carina of pronotum more or less distinctly elevated along its 

 entii-e length; dorsal surface of pronotum higher in the middle, 

 sloping on the sides; its surface rugose or wrinkled, as well as 

 granulated. 



b. Bodj^ slender, the posterior portion of pronotum long drawn out; 

 vertex viewed from above, obtusely angulate, its median 

 carina not projecting beyond the sides. . . .18 (jraniilatiis, p. 220 

 hh. Body less slender; pronotum less prolonged posteriorly; front of 

 vertex rounded, its median carina distinctly projecting. . . . 

 c. Front half of pronotum with its median carina but little 

 raised; middle femora of male but slightly enlarged, the 



expanded portion but one-third as long as broad 



19 ornatus, p. 222 



cc. Front half of pronotum with its median carina compressed 



and more elevated, more or less arcuate; middle femora 



of male enlarged, their expanded portion nearly or quite 



one-half as long as broad 20 hancocli, p. 223 



(Id. INIedian carina of pronotum indistinct, being not at all or very little 

 elevated; dorsal surface of pronotum flat, or nearly so, the surface 

 granulated, rarely if at all rugose. 



(/. Body rather slender, the posterior portion of pronotum pro- 

 longed, acute; vertex distinctly depressed in front; eyes promi- 

 nent; frontal costa straight and naiTowly suleate 



21 arcnosiis, p. 224 

 (Id. Body more robust, the pronotum less prolonged posteriorly; ver- 

 tex but little depressed in front; eyes of medium size; frontal 

 costa, when viewed from the side, distinctly sinuate 



22 ohscunis, p. 225 



18. Tettix granulatus (Kirby). 



Acrydium g t-a nidat i im K.irhj, 79, 1837, 251. 



Teilh- grmudatm Seiidd./l4 1, YH, 1862, 474; Id., 188, 1900, 16; 

 Thos., 206, Y, 1873, 182; Riley, 1 17, YllI, 1876, 150, Fig. 

 47; Id., 1 1 9, 1877, 230, Fig. 42; Id., 2 1 4, I. 1878, 256, Fig. 11; 

 Id., 122, n, 1884, 192, Fig. 268; Lint , 82, H, 1885, 197, Fig. 

 59; Bol., 19, 1887, 91; Fern., 53, 1888, 46, Fig. 18; Morse, 94, 

 YII, 1894, 154, 163, Plate 6, Figs. 3, 3a; Bl., II, XX^^, 1894, 

 220; Bent., 3, YI, 1894, 309; Hauc., 67, XXIII, 1896, 237, 

 Plate YI, Figs. 3, 3a; Plate IX, Fig. 28; Id., 68, X, 1899, 279; 

 Id., 69, 1902, 69, Plate TV, Figs. 2, 2a; Lugg., 84, 1898, 107, 

 Fig. 63. 



Tettiv morsei Heme. , 68, X, 1899, 280. 



