126 



FAMILY v.— TRYXALIN.^. 



Fig. 72. — Or- 

 phula pelidna. 

 •Original. 



i:op of pronotum green (brown in others); a broad reddish- 



i)rovvn l^and extends from the eyes to the posterior side of 

 the pronotum, limited above by the lateral 

 carinje, which are white. Sides of the prono- 

 tum below the band brownish or dull yel- 

 lowish. Wing-covers extending beyond the 

 end of the abdomen green, with a row of 

 square, black spots along the middle, and a 

 few irregularh' scattered smaller black spots. 

 It is a rather common insect in sandy or 

 liarren spots, and occurs in fairly large num- 

 bers along the bluft's of the Mississippi River, 

 where it is fully grown about the first of 

 August. Fig. 72 shows this insect. 



The structural characters of the head, 

 vertex and pronotum are the best means of 

 separating it from others of the same genus. 

 Length, male, 16-19 mm., female, 20-24 



mm.; tegmina, male, 14-17.5 mm., female, 18-20 mm.; 



anlennEe, male, 7-10 mm., female 8.5-10 mm.; posterior 



femora, male, 9.5-11 mm., female, 12-14 mm. 



Orphula speciosa Scud. 

 [Stenohothras sequalis Scud.). 



This is also a rather common locust, found everywhere 

 ■on dry soil; it is also variable in coloration. It was first 

 •described by Scudder from Minnesota specimens. 



Vertex of the head quite broad, not expanding at the 

 sides; apex not rounded; the sides of the angle straight; 

 •edges upturned considerably ; a slight median grove; no lat- 

 eral foveolae. Sides of the pronotum approximate, con- 

 stricted in the middle ; lateral carinje not so prominent and 

 sharp as the median. Wings as long as the tegmina, ex- 

 ^tending beyond the tip of the abdomen. 



Brown above, pale 3'ellow beneath. Face A^ellowish- 

 •brown; parts of the mouth pale-3^ellow^ Antenufe reddish- 



