SUBFAMILY II. OEDIPODIX.E. 253 



ray runs nearly to base of wing, near the front or costal margin; hind fe- 

 mora with outer face either uniform dark brown with a pale ring near 

 knee, or with alternating bands of black and white, which are more plainly 

 visible on inner face; hind tibiae dusky black or blue-black, with a pale 

 ring near base; abdomen reddish-brown or yellowish. Vertex with front 

 half of the deep concavity strongly ascending, median carina distinct but 

 low, sides forming an acute angle at apex. Pronotum with front margin 

 rounded or obtuse-angled, median carina entire, feebly arched, basal mar- 

 gin right-angled, disk more or less rugose (Fig. 90, a.) Length of body. 

 $, 17 22, $, 26 30; of antenna?, $ and 5, 67.5; of tegmina, $, 18.5- 

 23, $, 2126; of hind femora, $, 1114.5, 5, 1417 mm. (Fig. 92.) 



The sulphur-winged locust is a common insect throughout In- 

 diana, making its home in dry upland pastures and meadows, 

 along roadsides and on gravelly and rocky slopes. It passes the 

 winter in the nymph stage, sheltered beneath logs, chunks and rub- 

 bish, and begins to reach maturity in central Indiana about May 

 1st, being preceded only by Chortopliaga viridifasciata. It is most 

 abundant in June, and about July loth begins to be replaced by 

 its congener, A. tvantJioptcni. However, examples have been 

 taken in Marion County as late as September 10th. The mate, 

 when disturbed, moves in short, jerky flights, sounding its cym- 

 bals while in the air at every turn. The sound is a sharp, crack- 

 ling note, and is seemingly under the control of the insect. 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 prettity marked or 

 spotted with grayish and 

 greenish in imitation of 

 those lowly plants. 



The range of A. suljtlinrcii 

 extends from New England 

 and Ontario Avest to Minneso- 

 ta and eastern Nebraska, and 

 south and southwest to north- 

 Fig. 92. Male. (After Somes.) ern Florida, Oklahoma and 



Texas. The only definite record from Florida is from Leon To., 

 near the northern border, where Hebard found it in small num- 

 bers in pine woods, containing many scrubs oaks, the young being 

 plentiful throughout the winter months among dead leaves under 

 the oak and hickorv trees. 



V 



Iii Ontario sill i>lnn-cu has been definitely recorded only from 



