NO. 1124. REVISION OF THE MELANOPLI SC UDDER. 151 



pronotum together, sublanceolate, subacuminate, browDish fuscous, the 

 discoidal area sometimes with feebly alternating darker and lighter 

 dashes. Hind femora externally varying from fusco-olivaceous to fusco- 

 testaceous, the lower and inner faces flavous, the latter as well as the 

 inner half of the upper face barred at base and before and beyond the 

 middle with fuscous or blackish fuscous, the outer half of the upper face 

 more or less infuscated throughout, the genicular arc black; hind tibiae 

 red, the spines black only on their apical half, eleven or twelve in number 

 in the outer series. Extremity of male abdomen slightly clavate, much 

 upturned, the supraanal plate triangular with straight sides and acute 

 apex, the rather broad, deep, median sulcus bounded by very high, 

 sharp walls; furcula consisting of a pair of minute, acute denticula 

 tions overlying the ridges of the supraanal plate; cerci broad, arcuate, 

 especially by the curvature of the lower margin, tapering only in the 

 apical half, well rounded apically, much less than twice as long as 

 broad, but nearly as long as the supraanal plate, hardly incurved, the 

 apical portion feebly sulcate exteriorly ; infracercal plates large, basally 

 nearly as broad as the cerci, rapidly narrowing and extending slightly 

 beyond the supraanal plate; subgenital plate broad and rather short, 

 the lateral margins straight, apically acutely rounded, neither prolonged 

 nor elevated. 



Length of body, male, 14 mm., female, 20 mm.; antennae, male, 6.5 

 mm., female, 7.5 mm.; tegmina, male, 5 mm., female. 8.25 mm.; hind 

 femora, male, 9 mm,, female, 11 mm. 



Two males, 1 female. Colorado, 5,500 feet, Morrison (S. Heushaw; 

 S. H. Scudder). 



9. MELANOPLUS RILEYANUS (new species). 



( Plate X, fig. 9.) 

 Pezotettijc rileyanus McNEiix!, MS. 



Dark brownish testaceous, with a broad, lateral piceous stripe. Head 

 rather prominent, dark testaceous, sometimes with a feeble olivaceous 

 tinge, much flecked and punctate with fuscous, above much infus- 

 cated; vertex somewhat tumid, distinctly elevated above the pronotum, 

 the interspace between the eyes rather narrow, narrower than the first 

 antennal joint (male) or rather broad, distinctly broader than that joint 

 (female), the fastigium with slight, raised, rounded ridges next the eyes, 

 but otherwise scarcely sulcate (female) or distinctly sulcate throughout 

 (male) ; frontal costa moderately broad, fully as broad as (male) or rather 

 narrower than (female) the interspace between the eyes, subequal, 

 strongly punctate throughout, feebly sulcate at and below the ocellus; 

 eyes large and moderately prominent, distinctly longer than the infra- 

 ocular portion of the genae; antennae luteo testaceous, nearly (male) or 

 but little more than half (female) as long as the hind femora. Pronotum 



