NO. 1124. EEVISWy OF THE MELANOPL1 SCVDDEE. 257 



70. MELANOPLUS DECORUS, new species. 

 (Plate XVII, fig. 5.) 



Of medium size, very slender and elongate, brownish fuscous with 

 a ferruginous tinge above, flavous beneath. Head not at all prominent, 

 olivaceo-flavous more or less infuscated, above fuscous, with a broad 

 piceous postocular band; vertex hardly at all tumid, not raised above 

 the level of the pronotum. scarcely or not reaching the level of the 

 upper arch of the eyes, the interspace between the eyes very narrow, 

 hardly as broad as the first antennal joint; fastigium steeply decliveut, 

 feebly sulcate, oblong obpyriform; frontal costa percurrent, equal, 

 scarcely broader than the interspace between the eyes, feebly sulcate 

 at and below the ocellus, faintly punctate; eyes large, very prominent, 

 nearly twice as long as the infraocular portion of the genae; antennae 

 testaceous at base. Pronotum long, equal, with a scarcely perceptible 

 expansion of the metazona, brownish fuscous above, flavous or flavo- 

 testaceous on the sides, with a rather broad, percurrent, piceous, post- 

 ocular baud, narrower on the metazona than on the prozona, the disk 

 considerably convex and passing with only a feeble shoulder into the 

 vertical lateral lobes; median carina distinct, sharp, equal, percurrent; 

 front margin feebly convex with the faintest possible emargiuation, 

 hind margin subtruncate; prozona very longitudinal, nearly twice as 

 long as the densely and sharply punctate metazona. Prosternal spine 

 moderate, slender, conico-cylindrical, blunt, erect; interspace between 

 mesosternal lobes a little longer than broad. Teginina abbreviate, 

 shorter than the pronotum, attingent or subattingent, ovate, well 

 rounded apically, less than twice as long as broad, brownish fuscous. 

 Fore and middle femora somewhat tumid in the male; hind femora 

 flavous, sometimes more or less ferruginous, the whole geniculation 

 except the apical portion of the lower lobe black; hind tibiae pale 

 greenish or pale glaucous, the spines black to their base, fourteen to 

 fifteen in number in the outer series. Extremity of male abdomen 

 considerably clavate, recurved, the supraanal plate clypeate with 

 rectangulate tip, raised and sinuate lateral margins, a narrow, deep, 

 percurrent, median sulcus, the walls of which are hardly elevated into 

 ridges, and an apical pair of short, convergent, blunt ridges; furcula 

 consisting of a pair of basally attingeut, divergent, slender, tapering, 

 acuminate fingers, crossing rather more than a fourth of the supraanal 

 plate; cerci composed of a moderately broad, rapidly tapering, slightly 

 tumid, basal portion, about one-third of the whole, and a very slender, 

 subequal, gently arcuate, incurved, and apically faintly expanding por- 

 tion, hardly more than a third as broad as the base, inferiorly augulate 

 at tip and reaching about to the tip of the supraaual plate; subgenital 

 plate small, greatly tapering, so as to be very narrow at tip, the apical 

 margin considerably elevated to form a delicate tubercle. 

 Proc. N. M. vol. xx 17 



