296 REPORT OF STATE GEOLOGIST. 



has been taken on August 15th in numbers. There it makes its home 

 in the rank grasses, weeds and rushes which grow in such places. 

 The males are everywhere much more abundant and more active than 

 the females, though they usually fly a shorter distance. In Vigo 

 County it is frequent in patches of raw prairie and along the edges of 

 thickets bordering them; also in many places along the railways, 

 especially where they pass through prairie regions. Both sexes, when 

 flushed, arise with a whirring noise which, however, is not a true 

 slridulation. The males usually fly about 50 feet and settle down 

 on the grass or on a low shrub. This locust will doubtless be found 

 to inhabit suitable localities throughout the State, as it has been 

 taken from New England to California. 



68. ScHiSTocERCA RUBiGiNOSA (Haixis-Scudder) . The Rusty Locust. 



AcrkUum rubU/inosum Scudd., 1 4 1 , VII, 1862, 467; Glov., 62, 1872, 



Plate V, Fig. 5; Riley, 122, U, 1884; 194; Comst., 4 1, 1888, 



106; Feru., 53, 1888, 30; Beut., 3, VI, 1894, 304, Plate IX, 



Fig. 1. 

 Schistocerca ruUginosa Morse, 93, VII, 1894, 105; Id., 100, VIII, 255, 



269, Plate 7, Fig. 31; Sciidd., 18 4, XXXIV, 1899, 445, 462; Id., 



188, 1900, 48. 

 Schixfomva alutacea Rehn., Ill, XIII, 1902, 89; Id., 112, 312. 



Size, medium; the body of the female especially bulky. Head and 

 pronotum wider than in alutacea, but the vertex less prominent. 

 Frontal costa wider and flatter than in alutacea, sulcate below the 

 ocellus. Antennae of male a third longer than head and pronotum 

 together. Pronotum with the sides sloping on both prozona and 

 metazona; the median carina more prominent than in alutacea, other- 

 wise the same. Tegmina exceeding the abdomen in both sexes. 

 Notch at apex of cerci of male less evident than in preceding spe- 

 cies; that of sub-genital plate narrower, more V-shaped. 



Color a nearly uniform rusty brown, without median yellow stripe 

 on head and pronotum; the tcgmiiia usually with numerous dim, 

 rounded fuscous spots on the sides. Wings transparent and glassy, 

 slightly reddish toward the tip. 



Measurements: Length of body, male, 30 mm., female, 43 mm.; 

 of antennae, male, 13 mm., female, 15 mm.; of pronotum, male, 7 

 mm., female, 10 mm.; of tegmina, male, 27 mm., female, 37 mm.; of 

 hind, femora, male, 17 mm., female, 22 mm. 



This seems to be a scarce locust in Indiana, having been taken only 

 in Porter County. It prefers dry upland pastures and woodland, es- 

 pecially those with a soil of sand, where scrub oaks abound. Its 

 habits are the same as those of alulace^a. Eehn, he. cit. lias placed 



