100 THE CANADIAN ENTOMOLOGIST. 



This usually abundant species is rather scarce in Vigo County. It 

 frequents meadows, especially those of clover, and open pastures, and 

 like C. different ialis, uses its wings but little in moving from place to 

 place, relying upon its enormous leaps to carry it'out of danger. 



TETTIGIN^. 



27. Tettix ornata. Say. Red-spotted Grouse Grasshopper. 



Tettix offiata, Thos., Syn. Acrid. N. A., 1873, 183. 



Tetrix dorsalis, Harr., Ins. Inj., 1862, 186. 



Tetrix bilineata, Harr., loc. cit., 186. 

 Numerous specimens of this genus were taken which varied exceed- 

 ingly in size and coloration, but which, under the present confused state 

 of the literature at command, are all referred to the above species. They 

 frequent the edges of dry, open woods, where they were quite common 

 during the warm afternoons of October and November, 



28. Batrachidea cristata, Harr. The Crested Grouse Grasshopper. 



Batrichidea cristata, Thos., Syn. Acrid. N. A., 1873, ^9°- 

 Rare. Four or five specimens were feund in company with the last 

 named species. It is not mentioned in either of Thomas's Illinois lists, 

 and I can find no record of it west of New England. 



29. Tettigidea lateralis, Say. Black-sided Grouse Grasshopper. 



Tetrix lateralis, Harris, Ins. Inj., 1862, 187. 

 Tettigidea lateralis, Thomas, Syn. Acrid. N. A., 1873, 1S7. 

 Very common and variable in colour ; frequenting the same localities 

 as the last two species. 



30. Tettigidea polymorpha, Burm. Small-winged Grouse Grasshopper. 



Tettigidea polymorpha, Thomas, Syn. Acrid. N. A,, 1873, 188. 

 Tetrix parvipennis, Harris, Ins. Inj., 1862, 187, fig. 82. 



As common as the preceding, and found with it. 



The Grouse Grasshoppers are the only Acrididce which, with us, 

 hibernate in the perfect state. They have often been taken by the writer 

 in midwinter from beneath logs and the bark of stumps, and on warm 

 days in early spring they are very frequent on hillsides which have a 

 southern slope. Dr. Harris well describes their movements when he 

 says : — " They are extremely agile, and consequently very difticult to 

 capture, for they leap to an astonishing distance, considering their small 

 size, being moreover aided in this motion by their ample wings." 



