30 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



formed, suggesting that the individuals had dijQBculty developing 

 normally. 



Twelve males from Pittsburgh, Pa., have been examined, including 

 four from a single area within the city, Forbes Field. As a whole, 

 the aedeagus indicates an intergrading population, with no specimens 

 fully typical of either bilituratus bilituratus or hilituratiLS vulturnus. 

 There is variation, even within the series from Forbes Field, but most 

 of the specimens are nearer bilituratus vulturnus. Although Presque 

 Isle, Pa., is considerably north of Pittsburgh, the two males from 

 there both are typical of bilituratus vulturnus. Perhaps a series would 

 show intergradation. Jennings (1909) reported that though the 

 flora of Presque Isle is more northern than southern in its affinities, 

 some of the plants are typical of those centering in the lower Ohio 

 basin and on the Piedmont Plateau. Possibly this grasshopper 

 represents such a relationship. Jennings illustrated the many 

 ecological habitats which occur on Presque Isle. 



The single male from Nantucket examined is typical bilituratus 

 vulturnus, though a male from Marion, in the nearby Fall River area 

 of Massachusetts, is intermediate. Other Massachusetts specimens 



Explanation of Figure 8 



a-e: Left cercus of male, lateral view: 



a: Melanoplus borealis palaceus: 1, holotype; 2, topotype; 3, 4, from Lake- 

 view area, Mont. (2 specimens). 

 b: M. borealis utahensis: 1, holotype; 2, from Ogden, Utah; 3, from Big 



Cottonwood Canyon, Utah. 

 c: Intermediate between M. borealis utahensis and M. b. palaceus, 3 miles 



north of Mantua, Utah. 

 d: M. borealis stupef actus: 1, lectotype; 2, from Los Pinos, Colo.; 3, from 



Mineral Co., Colo. 

 e: Intermediate between M. borealis siupefactus, M. b. palaceus, and M. b. 



borealis, Tomboy, Colo. 

 f-i: Outline of epiphallus in dorsal view: 



/; M. borealis borealis, Nachvak Bay, Labrador, Canada. 

 g: M. b. utahensis, holotype. 

 h: M. b. stupef actus, holotype of latifercula. 

 i: M. bilituratus defectus, Casa Grande, Ariz. 

 /-/ (2): Outline of epiphallus of male in dorsal view, lophi only: 

 j: M. bilituratus bilituratus, Tuttle, Idaho. 

 k: M. bilituratus vulturnus, holotype, dry preparation. 

 /; M. devastator: 1, from Davis, Calif.; 2, from Sacramento Co., Calif. 

 Ii3)-m: Epiphallus in lateral view [/ (5)-m showing lateral outline of lophus only]: 



/; M. devastator: 3, lectotype; 4, from Roseville, Calif.; 5, from Tacoma, 



Wash., dry preparation; 6, from Tulare, Calif., dry preparation; 



7, from Gibson, Calif.; 8, same specimen as 7, in lateroposterior view; 



9, from Lower Lake, Calif. 

 m: M. bilituratus bilituratus, Milford, Calif. 



