NO. 11 24. REVISION OF THE HELANOPLISCrDDER. 213 



latter are rather short, and the hind tibiae either red or glaucous, with 

 nine to eleven spines in the outer series. 



The supraanal plate is triangular, with raised margins; the furcula 

 consists of a pair of slight and distant or very distant projections; the 

 cerci are stout and heavy, two or three times as long as broad, mesially 

 contracted and apically augulate; the subgenital plate is broad, 

 broader than long by the greater or less elevation of the entire and 

 well-rounded apical margin. 



There are but two species known, of medium size, one from New 

 Mexico and the other from Iowa and Dakota. 



79. MELANOPLUS ALLENI, new species. 

 (Plate XVIII, fig. 6.) 



Of medium size, blackish fuscous, with a ferruginous tinge. Head 

 not prominent, ferrugineo- testaceous more or less infuscated, above with 

 a broad, enlarging, median, fuscous stripe, and a broad piceous postoc- 

 ular band; vertex rather tumid, a little elevated above the pronotum, 

 the interspace between the eyes fully half as broad again as the firsc 

 an tenual joint; fastigium rapidly declivent, very feebly and very broadly 

 sulcate; frontal costa percurrent, subequal, a little narrower above, 

 about as broad as the interspace between the eyes, feebly sulcate at 

 and below the ocellus, biseriately punctate above; eyes rather large 

 and prominent, much longer than the iufraocular portion of the genae; 

 antennae ferruginous, almost as long as the hind femora. Pronotum 

 subequal but slightly enlarging on the rnetazona, with a broad piceous 

 postocular band confined to the prozona, but sometimes appearing very 

 faintly on the metazona, the disk broadly convex and passing by a 

 rounded shoulder nowhere forming lateral carinae into the anteriorly 

 faintly tumid vertical lateral lobes; median carina distinct on the 

 metazoua, subobsolete or obsolete on the prozona; front margin trun- 

 cate, hind margin very obtusangulate; prozona longitudinally sub- 

 quadrate, about a third longer than the densely and finely punctate 

 metazoua. Prosternal spine short, stout, conical ; interspace between 

 inesosternal lobes slightly longer than broad. Tegmina moderately 

 abbreviate, reaching a little beyond the middle of the hind femora, 

 moderately broad at base, tapering distinctly and pretty uniformly to 

 a strongly rounded tip, ferrugiueo- fuscous. Fore and middle femora 

 considerably tumid in the male ; hind femora moderately short but not 

 very stout, flavo-testaceous, obliquely bifasciate with fuscous, the under 

 surface pale carmine, the whole geniculation fuscous; hind tibiae pale 

 red, infuscated at base with a pale annulus beyond, the spines black 

 beyond their base, ten to eleven in number in the outer series. Ex- 

 tremity of male abdomen clavate, strongly recurved, the supraanal plate 

 triangular, with acutangulate apex, feebly and narrowly compressed 

 mesially, with a transverse median plica, tho margins broadly and con- 

 siderably elevated, the median sulcus percurrent between moderately 

 Proc. N. M. vol. xx 18 



