SUBFAMILY II. OEDIPODIN^E. 271 



the other stroked gently its back and antenna 1 without having it 

 attempt to escape. Mating takes place in late August and Sep- 

 tember, and the males then mostly perish, while the females are 

 to be found much longer, sometimes as late as November 5th. 

 Orange-winged females of rugctftus are more common than males, 

 probably one third of them having the wings of that hue. 



The general range of H. nigosus extends from Maine and 

 Massachusetts, where it is rare, west to Colorado and south and 

 southwest to northern Florida, Mobile, Ala., Oklahoma and cen- 

 tral Texas. It is not recorded from Canada or Michigan, but oc- 

 curs throughout Illinois, Iowa and Nebraska, and has been taken 

 at several points in Minnesota. In Florida it has been recorded 

 only from De Funiak Springs, Live Oak and Jacksonville. Allard 

 (1916, 277) calls it "a most clumsy, inactive locust, readily cap- 

 tured and without distinct stridulation." 



In my former work (1903, 272) I pointed out that H. variega- 

 tits Scudder (1892, 301) is only a little stouter bodied, lighter 

 colored form of mgosiis. In this I have been followed by B. & H. 

 (1916, 182), who state that 77. compactiis and H. sutiiralis Scud- 

 der (1892, 288, 301) ; H. citriiius Scudder (1901d, 88) and 7J. 

 hnnuH-itlatits Morse (1906, 119) are, in their opinion, also sy- 

 nonyms of H. nigostts', all having been based particularly upon 

 minor color differences, or upon "other characters which are with- 

 out exception worthless, due to their variability or to the fact that 

 they are so slight as to be unappreciable." 



VI. DISSOSTEIRA Scudder, 1876, 511. (Gr., "double" + "barren.") 



Medium or large sized locusts, having the body slender, strong- 

 ly compressed ; vertex with disk sub-pentagonal or ovate, the front 

 half declivent; sides narrow, sharp, converging in front of eyes, 

 the front margin a low angulate ridge, female, or angnlate depres- 

 sion, male; median carina present but indistinct; foveolie short, 

 triangular; frontal costa sulcate and a little narrowed below the 

 ocellus; pronotum with disk of prozona tectiform, its front mar- 

 gin subangulate, of metazona flat with hind margin obtuse-angled ; 

 median carina high, sharp, on metazona strongly arched, cut dis- 

 tinctly in front of middle by a deep, oblique notch; lateral carinre 

 rounded, cut by the principal sulcus and subobsolete in front of 

 it; lateral lobes of pronotum deeper than long, their front margin 

 vertical, hind one oblique, lower one with posterior half rounded, 

 anterior half oblique; tegmina broad, much exceeding the ab- 

 domen, their apical third membranous; intercalary vein very dis- 

 tinct and nearly intermediate between median and ulnar veins; 



