36 PROCEEDINGS OF THE NATIONAL MUSEUM vol. no 



June 6-7, 1938; Ft. Sill, Okla., Nov. 10, 1918; House Springs, Mo., 

 Nov. 11, 1925; Clarksville, Tenn., Oct. 14, 1916. In Virginia, Fox 

 (1917) concluded from observations of adult prevalence that there 

 are two generations per year. He found that adults appear about 

 June 1, reach a peak of abundance, and then in late July decline in 

 numbers; about the middle of August he noted the appearance of a new 

 group of adults. In Kansas, Wilbur and Fritz (1940) recorded a peak 

 of abundance from the middle of June until late July; in 1934 there 

 was a fall peak of adults between October 6 and November 9. 



Remarks: The name of this subspecies is from "vulturnus ventus," 

 a Roman term for a south-southeast wind, chosen in allusion to the 

 distribution of this subspecies. 



Explanation of Figure 10 



a-e: Epiphallus in lateral view, males: 



a: Melanoplus spritus, Neotype. 



b: M. bruneri: 1, from Ft. McLeod, Alberta, Canada; 2, from Mt. Moriah, 



Nev. 

 c: M. borealis borealis, Nachvak Bay, Labrador, Canada. 

 d: M. borealis stupefactus, holotype of latifercula. 

 e: M. borealis utahensis, holotype. 

 f-m: Left cercus of females: 



/; M. mexicanus, Cuernavaca, Mex. 

 g: M. bilituratus bilaturatus, Hogeland, Mont. 

 h: M. bilituratus defectus, San Carlos Indian Reservation, Ariz. 

 i: M. devastator, Gazelle, Calif. 

 /; M. bilituratus defectus, Chandler, Ariz. 

 k: M. bruneri, Isle Royale, Mich. 

 /: M. borealis borealis, lectotype of septentrionalis. 

 m: M. borealis stupefactus, Mineral Co., Colo. 

 n-p: Left dorsal valve of ovipositor: 



n: M. bilituratus bilituratus, Hogeland, Mont. 

 o: M. bilituratus vulturnus, allotype. 

 p: M. devastator, Gazelle, Calif. 

 q: Female apical abdominal structures of M. mexicanus, Cuernavaca, Mexico. 

 r-t: Left dorsal valve of ovipositor: 



r: M. bruneri, Isle Royale, Mich. 

 s: M. borealis borealis, lectotype of septentrionalis. 

 t: M. borealis palaceus, allotype. 

 u-x: Apex of male subgenital plate in posterior view: 

 u: M. bilituratus defectus, Chandler, Ariz. 

 v: M. spretus: 1, from Pueblo, Colo., July 8-9, 1877; 2, from Argentine Pass, 



Colo., July 16, 1877. 

 w: M. bilituratus bilituratus. Poplar, Mont. 



x: M. devastator: I, from Merced River, Yosemite National Park, Calif.; 

 2, from Tehachapi, Calif.; 3, from Alpine, Calif.; 4, from Grant's Pass, 

 Oreg. 



