NO. 1121. EE VISION OF THE MELANOPLI-SCUDDEK. 143 



3. MELANOPLUS SONORAE, new species; 

 (Plate X, fig. 3.) 



Pale testaceous (alcoholic specimens). Head not prominent, uniform 

 in coloring except for a sometimes obsolete median black stripe on sum- 

 mit, and a broad postocular piceous baud; vertex feebly tumid, not or 

 slightly elevated above the pronotum, the interspace between the eyes 

 half as broad again (male), or nearly twice as broad (female) as the first 

 anteunal joint: fastigium steeply declivent, silicate throughout, more 

 broadly in the female than in the male; frontal costa percurreut, rather 

 prominent above but shallow below, equal except for a sudden and 

 slight contraction between the antennae, 1 fiilly as broad as the inter- 

 space between the eyes, faintly sulcate at and below the ocellus, finely 

 and faintly punctate throughout; eyes of medium size and prominence, 

 longer, in the male much longer, than the intraocular portion of the 

 geuae; antennae testaceous, nearly two-thirds (male) or one-half (female) 

 as long as the hind femora. Pronotum compressed, unusually equal, 

 scarcely or not expanding on the metazona, the disk very uniform, 

 broadly convex, passing by a rounded angle into the iuferiorly vertical 

 faintly tumid lateral lobes without forming lateral cariuae; a broad 

 piceous belt, sometimes obscured, occupies the upper half of the lateral 

 lobes of theprozona; median carina distinct, percurrent, equal; front 

 margin subtruucate, hind margin very obtusangulate; prozoua dis- 

 tinctly (male) or feebly (female) longitudinal, about a fourth longer 

 than the finely punctate metazoua, which encroaches upon it mesially 

 by the angularity of the principal sulcus. Prosternal spine rather 

 long, appressed conical, a little retrorse, bluntly pointed; interspace 

 between mesosternal lobes subequal, a little longer than broad (male) 

 or transverse but narrower than the lobes (female). Tegmiua abbre- 

 viate, ovate-lanceolate, overlapping, from a little longer than the pro- 

 uotum to a third as long again, apically rather abruptly acuminate, 

 brownish-testaceous, sometimes with feeble signs of a slender line of 

 maculations. Fore and middle femora of the male a little tumid; hind 

 femora slender, testaceous (apparently olivaceo testaceous), sometimes 

 bimaculate with fuscous on the inner half of the upper face, with black 

 genicnlar arc; hind tibiae pale red (?), apically infuscated, the spines 

 pallid at base and black beyond, ten to. eleven, rarely twelve, in num- 

 ber in the outer series. Extremity of male abdomen clavate, strongly 

 recurved, the supraanal plate triangular but suddenly tapering a little 

 more rapidly just before the rectaugulate apex, the margins not in the 

 least elevated, the surface sloping in a concave curve to the summit of 

 the very sharp and rather high submedian ridges inclosing the very 

 deep and rather narrow percurreut median sulcus, whose margins are 



1 In one female specimen this is abnormally extended to nearly the whole supra- 

 ocellar region, narrowing the costa by one-half. 



