372 PROCEEDINGS OF THE NATIONAL lirSETM. VOL.XX. 



in front rather flaring to receive the head, the prozona quadrate (male) 

 or distinctly transverse (female), the prosternal spine short, conical, 

 and erect, and the interval between the mesosternal lobes relatively 

 broad. The tegmina are fully developed, longer than the hind femora, 

 maculate over their whole breadth. The hind femora are twice rather 

 narrowly belted with black, and the hind tibiae red, more or less 

 obscured. 



The supraanal plate of the male is triangular, the furcula very slight 

 or wanting, the cerci very large and broad, immensely expanded api- 

 cally and flabellate, with convex apical margin, the subgenital plate 

 very much prolonged and greatly elevated apically. 



The insects are of medium or large size and dark color, much mot- 

 tled, and live as far as known only on coniferous trees. Two species 

 are known, one from the Southwest, the other over a large part of the 

 country east of the Rocky Mountains. 



130. MELANOPLUS ARBOREUS, new species. 

 (Plate XXV, fig. 5.) 



Dull grimy olivaceous, heavily spotted and clouded with brownish 

 and blackish fuscous, giving it a more or less conspicuously mottled 

 appearance. Head very large and exceptionally prominent ; in brightest 

 specimens livid or dull pale flavous, heavily and irregularly flecked with 

 very dark olivaceous inclining to blackish fuscous, forming more or less 

 well-marked stripes, bordering the upper part of the eyes and following 

 the median line of the vertex ; vertex tumid ; interspace between the 

 eyes rather narrow, narrower than the frontal costa; fastigium rapidly 

 declivent, silicate, the sulcation broadening a little anteriorly; frontal 

 costa moderately broad, equal, laterally punctate, at and below the 

 ocellus sulcate; eyes large, very prominent, particularly in the male; 

 antennae pale flavous, becoming ferruginous apically, infuscated broadly 

 and obscurely at intervals throughout, a little longer (male) or a little 

 shorter (female) than the hind femora. Prouotum very feebly subsel- 

 late, the metazona flaring slightly and the prozona distinctly, though 

 over but little space, to receive the head, the front margin faintly con- 

 vex, the hind margin broadly angulate, the angle broadly rounded, the 

 whole brownish fuscous or yellowish brown, more or less mottled 

 (except on the metazona) with olivaceous or dull flavous and with fus- 

 cous, the latter (sometimes tinged with olivaceous) forming on the 

 upper half of the lateral lobes a broad more or less broken band; pro- 

 zona gently convex tranversely, passing insensibly into the inferiorly 

 vertical lateral lobes, quadrate (male) or distinctly transverse (female), 

 a half (male) or a fourth (female) as long again as the metazona, smooth, 

 the median carina very feeble, subobsolete between the sulci, but dis- 

 tinct though slight on the metazona ; the latter punctate, with feebly 

 indicated lateral carinae. Prosternal spine short, conical, bluntly 

 pointed, erect; interval between mesosternal lobes slightly longer than 



