220 FAMILY VI.— LOCUSTID^. 



Measurements. — Male: Length of body, 14 mm.; of 

 tegmina, 26 mm. ; of posterior femora, 19 mm. ; of prono- 

 tum, 4 mm.; width of tegmina, 5 mm. Female: Length of 

 body, 19 mm.; of tegmina, 25 mm.; of ovipositor, 5.5 mm. 



Prof Scudder, who has so carefully studied the songs of 

 most of ourorthoptera, gives the following pleasing account 

 of its song: "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 w^hich I 

 was already familiar, 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 

 w^as resumed on all sides. Judging that they preferred the 

 night song to that of the day, from their increased stridula- 

 tion during the former period, I imitated the night song 

 during sunshine, and obtained an immediate response in the 

 same language. The experiment proved that the insects 

 could hear as well as sing. The note b}^ day is b z r w i and 

 lasts for one-third of a second. The night song consists of a 

 repetition, ordinarily eight times, of a note which sounds 

 like t c h \v. 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." 



Scadderia pistillata Brunner. 



This species also occurs in Minnesota. It is found late 

 in summer in the same localities as curvicauda. It can be 

 readly recognized by its relatively broad tegmina. 



Apex of vertex concave; pronotum narrower in front 

 than behind; wnng-covers very broad, wider at the middle 

 than at the base and apex, with radiating veins ; anterior 

 margin curved, inner margin quite straight, apex rounded ; 



