SUBFAMILY II. OEDIPODIX.E. 



249 



106. ARI-IIIA XANTHOPTERA ( Bumieister ) , 1838, II, 643. Autumn Yellow- 

 winged Locust. 



Robust, moderately compressed, the males but little the smaller. 

 Color varying from very dark to pale reddish-brown, head and pronotum 

 usually lighter than tegmina, the latter in female often sprinkled with 

 numerous darker brown spots; inner wings with basal two-thirds either 

 deep yellow or orange-red, the outer third with a curved fuscous bar from 

 which a dark ray near costal margin extends backwards one-third the dis- 

 tance to base of wing; hind femora dull grayish-brown, the upper outer 

 face with two or three oblique blackish bars, knees fuscous, preceded by a 

 pale ring; hind tibiae dusky with a pale ring near base; ventral surface 

 dark brown to almost black. Differs from sulphured, with which it is 

 commonly associated in the eastern states, by its larger size and by having 

 the concavity of disk of vertex wider, subtruncate in front, its sides not 

 meeting but continuous with those of frontal costa, the latter with sides 

 not converging to apex; foveolas smaller, subtriangular; median carina of 

 pronotum higher, more distinctly arched and hind margin of pronotum 

 more acute. Length of body, $, 2127, 9, 2834; of antenna*. $, 1011, 

 9, 911.5; of tegmina, $, 2328, 9, 2530; of hind femora, $, 1518, 

 9. 1719 mm. (Fig. 91 and title page.) 



This is a common locust throughout Indiana, beginning' to 

 reach maturity in the central part of the State, from eggs hatched 

 in the spring, about July 20, and existing until November 1, or 

 later. It frequents the stubble of wheat, clover and timothy fields, 

 the banks along railways and the borders of high, dry, open wood- 

 lands and roadsides. One-third or more of the males have the 

 inner wings a deep orange yellow, but not more than one-sixth of 



the females have them so colored. 

 The orange-winged males are usual- 

 ly darker in color, sometimes almost 

 black, and the clacking sound 

 made in stridulation is seemingly 

 louder and more prolonged than in 

 the yellow-winged forms. This 

 sound is made as the insect rises 

 from the ground, and at times at 

 (After the points of turning in its zigzag 

 flight. It is a stronger and more 

 active flier than snJ]>Jiurcd and its note is louder and readily dis- 

 tinguished from that of the latter. 



In Florida A. ,rantJHt)itcr</ has been taken from numerous sta- 

 tions in the northern third of the State, where it occurs in pine 

 woods undergrowth, but it is not known south of Orange City 

 Junction. The range of .r<int}io]>tera extends from southern New 

 England, where it is common, west to Minnesota and western Ne- 



Fig. 91. 



Male, natural size. 

 Beutenmuller.) 



