NO. 1124. REVISION OF THE MELANOPLISCVDDER. 3fi9 



ridges; furcula consisting of a pair of subsemicircular distant lobes, 

 projecting from the middle of the thickened plates occupying the inner 

 portion of the last dorsal segment, the projecting portion lying outside 

 the bases of the ridges bordering the basal sulcus of the supraanal 

 plate; cerci large, broad, and rather stout, apically a little incurved, 

 broadly constricted mesially as seen from the side, the apical portion 

 triangularly expanded above, truncate after a slight expansion below, 

 the apical margin broadly convex, subtruncate; in fracercal plates about 

 as long as the supraanal plate, in the apical half a little expanded beyond 

 the lateral margins of the same; subgenital plate moderately narrow, 

 considerably prolonged and elevated apically, as well as thickened. 



Length of body, male, 33 mm. ; antennae, circ. 16 mm. ; tegmina, 25 

 mm.; hind femora, 18.5 mm. 



One male. Lerdo, Durango, Mexico, November (L. Bruner). 



This species is rather nearer to M. femoratus than to M. bivittatns, 

 though geographically separated more widely from the former. 



128. MELANOPLUS YARROWII. 

 (Plate XXV, fig. 2.) 



Caloplenus yarroicii THOMAS, Rep. Geol. Geogr. Expl. 100th Mer., V (1875), p. 

 894, pi. XLV, fig. 5; Rep. U. S. Ent. Comm., I (1878), p. 43. BRUNER, ibid., 

 111(1883), p. 60. 



Light brownish yellow, somewhat cinereous, nearly uniform. Head 

 nearly uniform, hardly darker above, the vertex gently tumid, the 

 interspace between the eyes not very broad, distinctly narrower than 

 the frontal costa, the fasti giuin feebly sulcate throughout; frontal costa 

 moderately broad, slightly broader below than above, failing to reach 

 the clypeus, very feebly and broadly sulcate below the ocellus, punctate 

 on either side; eyes moderate, only feebly prominent, hardly longer 

 than the in fraocular portion of the genae; antennae red. Pronotum 

 feebly enlarging apically, the front margin truncate, the hind margin 

 bluntly and very obtusely angulate, the disk nearly plane, the lateral 

 lobes subvertical; median carina feeble, subobsolete between the sulci; 

 lateral carinae very rounded ; prozoua nearly smooth, scarcely longi- 

 tudinal (male) or quadrate (female), but little longer than the metazona, 

 its middle sulcus transverse, the posterior sinuate; metazoua closely 

 and rather finely punctate; pronotum without markings except a faint 

 slender flavous streak along the discal side of the lateral carinae and, 

 in the male at least, some irregular blackish fuscous blotches on the 

 lateral lobes. Prosternal spine moderately long, conico-cylindrical, 

 blunt, erect. Tegmina reaching the tip of the hind femora, brownish 

 testaceous without markings, tapering very gently and regularly to a 

 well-rounded tip; wings pellucid with a feeble greenish tinge, the veins 

 and cross veins fuscous only above the anal area, except to a slight 

 degree. Hind femora olivaceo-testaceous, more or less infumated above 

 and on the outer face, the lower carina of the outer face flavous, and 

 Proc. N. M. vol. xx 24 



