306 ruocEEinxas of the xatiosai. musei m. vol.xx. 



sides, laterally compressed jnst before the apex and the marfjin a little 

 toitiious, the iipex itself stroiitfly aeiitan^iihite but blunt, the nu'diaii 

 sulcus pereuneiit. but nearly efl'aeed at the constrictioii; furcula cou- 

 sistiu}^ of a pair of slender, subeylindrical, ])retty stron«»ly (liverf;ent, 

 arcuate, rej-ularly tapering, acuminate tin*;:ers, not a tiiird as lou^^ as tiie 

 supraanal plate; cerci consistin;i: of spatulate incurved ]ku1s, hardly 

 three times as long as the basal breadth, gently and slightly tapering 

 f.om base to n)i«ldle, beyond well rounded, nearly as broad as at base, 

 exteriorly h()ll(»wed., and reaching only to the compressed part of the 

 supraanal jdate; infracercal plates forming broad tapering cushions 

 for the <'erci to rest ujjon, as long as tiie supraanal jdate; subgenital 

 plate forming a feebly tlaring quadratic scoop, the ai)ical nnirgin feebly 

 elevated laterally and between these elevations feebly notched. 



Length of body, male, lit) mm., female, 22.5 mm.; antennae, male, 10 

 mm., feaiale, 8.75 mm.; tegmina. male, 10 mm., female, 10.5 mm. j hind 

 femora, male, 11.5 nun., female, 13 mm. 



Three males, 3 females. Fort liobinson, Dawes County, Nebraska, 

 August (L. Bruner); West Toint, Cuming County, Nebraska, July 

 (I^.S.N.M. — liiley collection); Yellowstone, ^lontana, August (L. 

 Bruner), Since description, Mr. \V. S. Blatchley has sent me speci- 

 mens from Lake ('ounty, Indiana. » 



Bruner states that this species feeds on Artemivsia and ])refers " to 

 jumj) from ])lant to plant rather than to alight upon the ground.'' " It 

 occurs both on high and low lands, but appears to be somewhat partial 

 to old breakings and well-fed i)astures of many j-ears' use.'' 



I suspect that the insect from Minnesota, described by Thomas' as a 

 variety of CaJopienus orcifleiitdlis, may belong to this species. 



95. MELANOPLUS IMPIGER, new species. 

 (Plate XX, figs. 7, 8.) 



Of moderately large size, above rather light brownish fuscous with 

 a ferruginous tinge, below luteo-testaceous. Head slightly promiuent, 

 dull luteo-testaceous, often punctate with olivaceous, with a postocular 

 l)iceous band, and above much mottled or marmorate with fuscous: 

 vertex gently tumid, considerably elevated above the level of the pro- 

 notum, the interspace between the eyes fully half as broad again (male) 

 or fully twice as broad (female) as the first anteunal joint; fastigiuni 

 steeply decliveut, shallowiy and broadly sulcate, sometimes feebly 

 in the female; frontal costa percurrent (male) or scarcely percurrent 

 (female), feebly contracted above but otherwise subequal, as broad as 

 the interspace between the eyes, and so distinctly broader in the female 

 than in the male, feebly but variably sulcate at and a little below the 

 ocellus, punctate throughout; eyes rather large, not very prominent, 

 distinctly longer than the infraocular portion of the genae; antennae 



'Kep. V. S. Geol. & Geogr. 8urv., V., p. 162. 



