ORTIIOPTERA OF INDIANA. 347 



song, from whicli I take the following extract: "It is more noisy 

 by night than by day; and the songs differ considerably at these two 

 times. The day song is given only during sunshine, the other by 

 night and in cloudy weather. I first noticed this while watching one 

 of the little creatures close beside me; as a cloud passed over the sun 

 he suddenly changed his note to one with which I was already famil- 

 iar, but without knowing to what insect it belonged. At the same 

 time all the individuals around me, whose similar day song I had 

 heard, began to respond with the night cry; the cloud passed away, 

 and the original note was resumed on all sides. Judging that they 

 preferred the night song to that of the day, from their increased 

 stridulation during the former period, I imitated the night song dur- 

 ing the sunshine, and obtained an immediate response in the same 

 language. The experiment proved that the insects could hear as 

 well as sing. * * * The note by day is hzrwi and lasts for one- 

 third of a second. The night song consists of a repetition, ordinarily 

 eight times, of a note which sounds like tchw. It is repeated at the 

 rate of five times in three-quarters of a second, making each note 

 half the length of the day note." 



82. SCUDDERIA PISTILLATA Bruiiiier. 



Scudderia pistillata Brnnn., 38, 1878,240; Beut., 3, VI, 1894, 276; Sauss. 

 Pict., 136, 1897, 328, 332; Lugg., 84, 1898, 220, Figs. 144, 

 145; Scudd., 18 2, 1898, 273, 277; Id., 18 8, 1900, 69. 



This species is closely allied to S. curvicauda but is shorter bodied, 

 broader winged and shorter legged. The notch of supra-anal spine 

 of male is very similar to that of the male curvicauda, but the lateral 

 processes are sub-triangular and distinctly tapering instead of well 

 rounded and of sub-equal breadth as in the latter species. The sub- 



Fig. 79. Scudderiapiitillata Brunn. Fig. 80. (a) Extremity of male abdomen of 



Male. (After Lugger). Scudderia piatillata Brunn. (6) Dorsal view 



of anal segment of game. (After Scudder). 



anal spine is also shorter than in curvicauda. The short, broad 

 tegmina and the short hind femora of pistillata are the characters 

 which most readily distinguish the two. 



