316 PROCEEDINGS OF THE NATIONAL MUSEUM. 



ing of a pair of slight, distant, slightly divergent, slender denticnla- 

 tions on the outer side of the ridges bounding the median sulcus of 

 the supraanal plate; cerci consisting of two parts a straight, slightly 

 tapering, punctate, compressed lamina about twice as long as broad, 

 and a more strongly compressed apical flange bent at a tolerably strong 

 angle with it, a little expanded, apically rounded angulate, externally 

 deeply sulcate, scarcely falling short of the tip of the supraanal plate; 

 infracercal plates apparently as in M. corpulentus ; subgenital plate 

 moderately broad, subequal, the apical margin not elevated, very feebly 

 flaring, strongly rounded, not mesially angulate, entire. 



Length of body, male, 20 mm., female, 23.5 mm.; antennae, male, 8.5 

 mm., female, 9 mm; tegmina, male, 14.5 mm., female, 16 mm; hind 

 femora, male, 10.5 mm., female, 12.5 mm. 



One male, 1 female. Southwest Nebraska (L. Bruner). 



This species looks like a diminutive form of the preceding, but differs 

 from it in many points of structure and in coloring, besides those men- 

 tioned in the table. 



ioo. MELANOPLUS COMPACTUS, new species. 



(Plate XXI, fig. 6.) 

 Melanoplus compacius BRUNEK!, MS. 



A medium-sized species, blackish fuscous in coloring, more or less 

 tinged with ferruginous. Head not prominent, rufo-luteous more or 

 less clouded with fuscous, with a median blackish fuscous stripe above 

 and a postocular piceous band; vertex gently tumid, feebly elevated 

 above the pronotum, the interspace between the eyes considerably 

 broader than (male) or nearly twice as broad as (female) the basal 

 antenual joint; fastigium steeply declivent, sulcate throughout, more 

 deeply in the male than in the female; frontal costa just failing to 

 reach the clypeus, feebly narrowed above but otherwise subequal, as 

 broad as the interspace between the eyes, sulcate at and below the 

 ocellus, biseriately punctate above; eyes not prominent nor large, about 

 as long as the intraocular portion of the genae; antennae red, gradually 

 infuscated apically, in the female more than three-fourths as long as the 

 hind femora. Pronotum stout, gradually enlarging posteriorly, the lat- 

 eral lobes of the prozona with a more or less distinct piceous postocular 

 band, the disk passing into the vertical lateral lobes by a distinctly 

 though slightly angulated shoulder, for mingfeeblelateralcarinae; median 

 carina percurrent but much feebler on the prozona than on the metazona; 

 front margin truncate, hind margin obtusangulate; prozona feebly (male) 

 or distinctly (female) transverse, no longer than the closely punctate 

 metazona. Prosternal spine rather short and rather stout, much 

 appressed, tapering, very blunt; interspace between mesosternal lobes 

 a little longitudinal (male) or a little transverse (female), the nieta- 

 sternal lobes attingent (male) or moderately distant (female). Tegmina 

 surpassing a little the hind femora, moderately broad, brownish fuscous 



