294 PROCEEDiyOS of the SATJONAL MlSEljt. VOL. XX. 



tumid, slightly elevated above the pronotuni, the interspace between 

 the eyes not brojid, but much broader than the first antennal Joint; 

 fastigiuni very steejily declivent, deeply sulcate throughout; frontal 

 costa tailing to reach tiie clyi)eus, slightly contract^'d above, elsewhere 

 fully as broad as, if not broader than, the interspace between the eyes, 

 sulcate at and below the ocellus, biseriately punctate above; antennae 

 i'^teo-ferruginous, nowhere infuscated, except sometimes at extreme 

 tip, about three-fourths as long as the hind femora. Prouotum sub- 

 equal, scarcely expanding on the metazona, the lateral lobes with a 

 somewhat obscure, piceous band, crossing the proz(ma above; disit 

 feebly convex, passing by a rounded shoidder, becoming almost a 

 lateral carina on the metazona, into the tumid, vertical, lateral lobes; 

 median carina distinct on the metazona. feeble and blunt on the pro- 

 zona; front margin feebly convex, hin<l margin ahnost rectangulate; 

 prozona quadrate or feebly longitudinal, scarcely or slightly longer 

 than the densely punctate metazona. Prosternal spine rather long, 

 oect, cylindrical, rather blunt; interspace between mesosterual lobes 

 about half as long again as broad. Tegmina surpassing the hind femora, 

 rather slender, gently tapering, well rounded apically, brownish fuscous, 

 with very slight, obscure signs of sparse maculation in the discoidal 

 area; wings hyaline, with the anterior and apical veins testaceous. 

 Hind femora ferrugin<fus or luteo-ferruginous, sometimes with an oliva- 

 ceous tinge, bifasciate above with blackish fuscous, generally obscurely, 

 and with a basal spot of the same, the under surface luti'ous or ferru- 

 ginous, the genicular arc black; hind tibiae pale glaucous green, a little 

 pallid at the base, with an obscure, fuscous, post-basal annulus, the 

 spines black beyond their pallid base, eleven in number in the outer 

 series. Extremity of male abdomen clavate, somewhat upturned, the 

 supraanal plate and furcula as in M. hispinosus; cerci also shaped as 

 there, but snuiller and slenderer, fully six times as long as the narrow- 

 est breadth; subgenital plate narrowing regularly from base to apex, 

 much longer than broad, subconical, the apical margin with a hardly 

 perceptible elevation, entire, as viewed from above acutangulate, the 

 angle blunt and a little thickened. 



Length of body, male, 21 mm.; antennae, 9 mm.; tegmina, 17.5 mm,; 

 hind femora, lli.2.") mm. 



Five males. Gulf coast of Texas, Aaron; Carrizo Springs, Dimmit 

 County, Texas, Wadgymar, Kovember ( L. Bruner). * 



This species is exceedingly close to M. bispinosHSy but is smaller, 

 darker, a more southern form, and differs by its slightly smaller and 

 slenderer cerci, the general characters of the subgenital plate aiid in 

 minor peculiarities of its structure. It can be confounded with no 

 other species. 



