292 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



The supraanal plate is generally rather simple, triangular with 

 convex sides and a generally produced apex, but is sometimes strongly 

 and abruptly compressed apically. The furcula is developed to an 

 extreme as a pair of parallel, flattened, pointed plates, usually more 

 than half as long as the supraanal plate. The cerci are rather slender 

 or only moderately broad, apically spatulate or subspatulate, incurved 

 or inbent, of variable length relative to the supraanal plate. The sub- 

 genital plate is moderately broad apically, but distinctly narrower 

 than long, the apical margin entire and not elevated, or only slightly 

 elevated. 



The species, six in number, are of medium or slightly above the 

 medium size and with the exception of the typical species are found 

 only in the extreme Southwestern States Southern California, Arizona, 

 and Texas, and in Lower California and Sonora, but the typical species 

 extends the range on the north to Washington, Idaho, and Wyoming, 

 and eastward to Louisiana and western Nebraska. It is a western 

 type. 



86. MELANOPLUS BISPINOSUS, new species. 

 (Plate XIX, fig. 6.) 



Cinereo-fuseous, more or less ferruginous. Head slightly prominent 

 in the male only, warm testaceous, infuscated above, with a postocular 

 piceous band; vertex gently tumid, raised but slightly above the level 

 of the pronotum, the interspace between the eyes rather broad, much 

 broader than (male) or fully twice as broad as (female) the first anten- 

 nal joint; fastigium steeply declivent and plane (female) or broadly 

 and shallowly sulcate (male); frontal costa fading next the clypeus, 

 a little narrowed above, but otherwise fully as broad as (male) or 

 slightly narrower than (female) the interspace between the eyes, feebly 

 snlcate at and below the ocellus, biseriately punctate above; eyes rather 

 large, somewhat prominent, a little longer than the infraocular portion 

 of the genae; antennae ferruginous, apically infuscated, in the male 

 more than four-fifths as long as the hind femora. Pronotum subequal, 

 but with distinctly flaring metazona, the feebly convex disk passing by 

 a broad angle into the subvertical and feebly tumid lateral lobes, leav- 

 ing no trace of lateral carinae except slightly on the metazona; lateral 

 lobes with a distinct though sometimes broken broad piceous band 

 crossing the upper part of the prozona, broadest on its posterior lobe; 

 median carina distinct on the metazona, inconspicuous and blunt 

 (male) or subobsolete (female) on the prozona; front margin truncate, 

 hind margin obtusangulate, the angle well rounded; prozona quadrate, 

 only a little longer than the finely punctate metazona. Prosternal 

 spine moderately long, stout, cylindrical, very blunt, erect; interspace 

 between mesosternal lobes fully twice as long as broad (male) or sub- 

 quadrate (female). Tegmiua surpassing the hind femora, of moderate 

 width, gently tapering, apically well rounded, fusco-testaceous more or 

 less ferruginous basally, flecked somewhat obscurely with fuscous and 



