OETHOPTERA OF INDIANA. 297 



it as a synonym df that species; but, aside from the color, the shorter 

 antennse, less prominent vertex and frontal costa, and more sloping 

 disk of pronotum are sufficient to show its distinctness. The mere 

 fact that on one or two occasions, opposite sexes df it and alutacea 

 were found in copulation is no proof of their identity in species, for 

 such widely diversified fdi*ms as Melaiioplus livittatus and Meldnoplus 

 dijferentialis have been ndted thus. RuUginosa ranges over the 

 United States east of the Great Plains and will doubtless be found 

 to inhabit dry sandy localities in many portions of the State. 



XXXVII. Hesperotettix Scudder (1876). 



Size small; the sides nearly parallel; not greatly compressed. Head 

 small, the vertex opposite the middle of eyes but little wider than 

 second joint of antennge; the portion in front with a slight median 

 furrow or depression. Face but little oblique, the frontal costa nar- 

 row, sulcate throughout, punctate. Antenna of female equaling the 

 head and pronotum together; a fourth longer in the male. Pronotum 

 longer than in allied genera except Paroxya, the prdzona half as long 

 again as metazona, the sides of disk broadly sloping; the median 

 carina low, not cut by the first and second sulci; the hind margin 

 very obtusely angulate. Lateral lobes of pronotum with the front 

 and hind margins nearly straight, oblique; the lower margin with its 

 front half directed upward. Tegmina usually equaling or slightly 

 exceeding the tip of abdomen. Fore and middle femora of male 

 swollen; hind femora slender, much surpassing the abdomen. Sub- 

 genital plate of male entire, but with a more or less distinct sub- 

 apical tubercle. 



Seven nominal species are known from the United States, mostly 

 from west of the Mississippi River. One has been taken sparingly 

 in northern Indiana. 



59. Hesperotettix pratensis Scudder. 



Hesperotettix pratemis Sciidd., 18 1, 1897, 57, 64, Plate V, Fig. 3; Id., 

 188, 1900,50; Lugg., 8 4, 1898, 177, Fig. 107; Bnin., 36, 1899, 

 247, 271. 

 Ommatolampis viiidis Thom., 206, V, 1873, 156 (in part). 



Pronotum slightly increasing in size from in front backward. Teg- 

 mina equaling or slightly exceeding the abdomen in both sexes. 

 Supra-anal plate of male triangular, the middle of either half with a 

 distinct ridge, which converge and enclose a basal groove, in which 

 lie the minute, rounded fureula. Cerei, shorter than supra-anal 



49-Geol. 



