ORTHOPTEEA OF INDIANA. 255 



KEY TO INDIANA SPECIES OF ARPHIA. 



a. Upper third of frontal costa with the sides converging, meeting at the 

 point of union with the front of vertex; median carina of pronotum 

 lower and less curved; hind margin of pronotum ending in a right 



angle, or obtuse angle 38 sulphur ea, p. 255 



aa. Upper third of frontal costa with the sides scarcely converging; dis- 

 tinct at the point of meeting with the front of vertex; median 

 carina of pronotum, viewed from the side, high and arched, crest- 

 like; hind margin of pronotum ending in an acute angle 



39 xanthoptera, p. 256 



38. Arphia sulphurea (Fabricius). The Sulphur- winged Locust. 

 Gryllus sulphureus Fab.. 5 1,1, 1781, 369. 

 Locusta sulphurea Harr., 70, 1833, 583; Id., 7 2, 1862, 177, Plate I, 



Fig. 6; Emm., 4 9, V, 1854, 146; Rathv., 109, 1862, 386, Fig. 



27. 

 (JEdipoda sulphurea Burm., 40, II, 1838, 643; Scudd., 14 1, VII, 1862, 



470; Glov., 62, 1872, Plate V, Fig. 6. 

 Tomonotm sulphureus Thorn., 206, V, 1873, 105; Id., 2 11, IX, 1880, 



89, 107. 

 Arphia sulphurea Stal., 200, I, 1873, 119; Sauss., 134, 1884, 71; 



Fern., 53, 1888, 39; BL, 4, XXIII, 1891, 77; Beut., 3, VI, 



1894, 296, Plate VIII, Fig. 10; Morse, 99, VUI, 1897, 36, 51, Plate 



2, Fig. 17; Lugg., 84, 1898, 136, Figs. 78, 79; Scudd., 188, 



1900, 30. 



Color, varying from dark brown, almost blackish in some males, 

 to pale yellowish brown. The tegmina of males often with a pale 

 yellowish band along the dorsal or hind margin; those of the lighter 

 colored females often thickly sprinkled with small fuscous spots. In- 

 ner wings with their basal two-thirds a bright sulphur yellow. A 

 dusky curved band covers the outer third; from which a distinct dark 

 ray runs nearly to the base of the wing, near the front or costal mar- 

 gin. Hind femora with the outer face either uniform dark brown 

 with a pale ring near the knee, or with alternating bands of black 

 and white, which are more plainly visible on the inner face. Hind 

 tibiae dusky black, or blue black, with a pale ring near the base. 

 Abdomen reddish brown or yellowish. Many of the young and a few 

 of the adults which appear in spring, or those, which live on high, 

 rocky woodland slopes where lichens are abundant, often have the 

 pronotum and hind femora prettily marked or spotted with grayish 

 and greenish in imitation of those lowly plants. 



Measurements: Length of body, male 22 mm., female 32 mm.; of 

 antennffi, male and female, 7 mm.; of tegmina, male 23 mm., female 

 26 mm.; of hind femora, male 14.5 mm.; female, 18 mm. 



