318 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



Sierra Nevada in central California, and the last in central Mexico. I 

 have also in my collection another species (No. 351) from Mexico, allied 

 to one of the Texan species, but of which I know only the female, and 

 therefore do not describe. 



This series represents to a certain extent, in brachypterous forms, 

 the robustus series of macropterous species. 







lox. MELANOPLUS DUMICOLA. 

 (Plate XXI, fig. 7.) 



Pezolettix dumicolus SCUDDER!, Proc. Bost. Soc. Nat. Hist., XX (1879), pp. 76-77; 

 Cent. Orth. (1879), pp. 65-66. BRUNER, Rep. U. S. Ent. Comm., Ill (1883), 

 p. 59. 



Of small size, smooth and glistening. Head not prominent, the ver- 

 tex feebly tumid, scarcely elevated above the pronotum, the interspace 

 between the eyes very narrow, much less than (male) or scarcely equaling 

 (female) the width of the first an tennal joint; fastigium steeply declivent, 

 shallow, slender, subspatulate with rather coarse bounding walls; 

 frontal costa moderate, equal except in being very slightly and roundly 

 contracted above, wider than the interspace between the eyes, sulcate 

 at and below the ocellus, sparsely punctate; eyes rather large, rather 

 prominent especially in the male, very much longer than the infraocular 

 portion of the genae; antennae four- fifths (male) or two-thirds (female) 

 as long as the hind femora. Pronotum very simple, uniformly and very 

 slightly expanding posteriorly, the front border truncate or scarcely 

 convex, the hind border slightly and broadly mesially einarginate; lat- 

 eral carinae completely obsolete and uniform, the disk passing insensibly 

 into the lateral lobes ; median carina faint, very blunt, equal throughout ; 

 prozona distinctly (female) or very (male) longitudinal, sparsely and 

 rather faintly punctate, the metazona more distinctly and abundantly 

 but with minuter puncta. Prosternal spine rather small, erect, conical, 

 in the female a little appressed; interspace between mesosternal lobes 

 more than twice as long as broad (male) or quadrate (female). Tegnrina 

 lateral, minute, considerably shorter than the pronotum, bluntly 

 rounded apically, the inner margin nearly straight, the costal very con- 

 vex, the whole twice as long as broad. Fore and middle femora consid- 

 erably tumid in the male. Extremity of male abdomen considerably 

 clavate, strongly recurved, the supraaual plate triangular, a very little 

 longer than broad, the sides nearly straight, the extreme tip blunt; 

 furcula reduced to a pair of broad, lamellate, triangular teeth, their 

 angle projecting but little at the middle of either half of the supra- 

 anal plate; cerci broad, compressed-laminate, subequal but somewhat 

 and broadly constricted in the middle, straight and directed upward, 

 the apical half also incurved, the apex excised and produced a little 

 above; subgenital plate quadrate, tumid, the apical margin semicircu- 



