GRASSHOPPERS — GURNEY AND BROOKS 



13 



/ 



d 



f 



I 



jncorov bridge 



dorsal 

 volve 



posterior 7 accessor- 



projection 10 lobe 



Figure 1. — a, Sketch showing location (circle) of mesosternal hump in ventral view of 

 thorax of certain species of Melanoplus, b, Melanoplus bilituratus bilituratus, female, 

 Medicine Lake, Mont., apical portion of abdomen (z, cercus). c, M. femur-rubTum, 

 female, Poplar, Mont., same view as b. d-g, Males, showing lateral view of mesosternal 

 area in lateral profile: d, M. bilituratus: 1, M. b. vulturnus, Marshall, Mo.; 2, M. b. bili- 

 turatus, Pullman, Wash, e, M. devastator: 1, 2, two specimens from Tulare, Calif. 

 '', M. spretus, Minnesota, Oct. 6, 1876. g, M. bruneri: 1, East Spanish Peak, Colo.; 

 2, Fishers Peak, Colo.; 3, Mt. Moriah, Nev. h-i: M. femur-rubrum, male, Euclidj 

 Minn.: h, dorsal view of epiphallus; i, aedeagus: 1, lateral view; 2, dorsoposterior view. 



valve is irregular (fig. 3,^) ; the specimen is not typical of any one of 

 the subspecies, nor is it like the Marfa specimen. Additional material 

 from western Texas is required to determine the relationship of the 

 one or more populations present. 



Texas males of bilituratus examined are as follows : 



M. bilituratus vulturnus: Gainesville, Wichita Falls, Quanah, Dallas, College 

 Station, Austin, Wimberley, 2 miles east of Cedar Creek, Bastrop Co, 



M. bilituratus defectus: Phantom Lake (Davis Mountains). 



Intermediates of uncertain relationship (M. bilituratus in a broad sense) : Blanco 

 Co., Plainview, Lubbock, Sweetwater, Marfa. 



