236 ri{()ci:i:i)i\(is of tin: .\ trios. il Mrsia.w. vol xx. 



black 1h\voii(1 tlic base, ten to elcvi'ii, laroly nine or twelve, in the outer 

 series. I'.xtnMiiity of niale abdr len rather stroiij;ly elavate, eonsuler- 

 ably recurved, the snpraanal plate trianfiular, with feebly elevated 

 lateral niarji:ins and bluntly aeutangulate apex, the median sulcus nar 

 row, deep, and equal, between hi<;h but rounded walls, terniinatinj? a 

 little beyond the middle of the plate and leaving the tip eochlcarate; 

 furcula consistinj; of a ]>air of minute slender dentieulations overlying' 

 the subnu'dian ridges of the snpraanal plate; cerci subequal. taperin;: 

 in the basal fourth <»nly, beyond enlarged to the sliuhtest degree, gently 

 inciirved throiighout but otherwise nearly straight, feebly sulcate exte- 

 riorly at the rounded apex, falling well short of the tip of tlu' supra 

 anal i»late; ^ubgenital ])late small, narrowed teebly in the middle of 

 eit.ier side, the apical margin gradually and gently elevated, entire, 

 well rouiub'd as seen from above. 



Length of body, male, 20 mm., female, 1*3 mm.; antennae, female, 

 I0.."i mm.; tegmina, male, 7 mm., female, 8.5 mm.; hind femora, male, 

 11 mm., fenuile, 15 mm. 



One male. 7 females. Michigan, M. Miles; Rock Island, Illinois, \\. 

 1). Walsh; Dallas Coujity, l«>wa, August, J. A. Allen. 



This species was determined in 18()5 by the late li. 1). Walsh as Pez. 

 8cu({(h'rl rhler, described from the same ]dace but (juite distin<'t. It is 

 possible that the two sexes here (lescribed b'.dong to two ditferent spe- 

 cies, as there is considerable and unusual ditt'erence between them in 

 the shape of the eye and the character of the postocular band; but 

 they a^.ee sj well otherwise, and show the same pallid annulus on tlie 

 hin«l tibiae, that I regard them as the same. If distinct, the name here 

 ai>i)lied should be given to the female, as only the fenuile was received 

 froui Walsh. The male comes from Michigan. 



56. MELANOPLUS ALTITUDINUM. 

 (Plate XVI, fi«. 1.) 



recotettix marsh, i ScrnDKH!, Ami. Kep. Chii-f Knj;., 187») {187G), p. 502; Ann. 



Rep. (ieogr. Siirv. l(>C)tb Mer., 1876 187G), p. 282. 

 Pezott'tlir (iltUiiilinum !Scii)I>krI, Proc. Bost. Sot-. Xat. Hist., XX (1879), p. 86; 



Cent. (^rth. (1871>). p. 75. 

 recoltttix samniinip^'^ UkinkhI, Piibl. X<l»r. Acad. Sc.. Ill (1893), p. 27 — umU'sir 



Of medium (male) or moderately large (female) size, there being 

 unusual disparity between the sexes, blackish griseous, ferrugineo testa- 

 ceous beneath. Head not prominent, ferrugineo testaceous below, ])ass 

 ing into blackish fuscous above, with a broad, piceous i)ostocular band; 

 vertex somewhat tun 'd, elevated but little above the pronotum, the 

 interspace between yes nearl^^ twice ( male) or nearly thrice (female) 



as broad as the lirst an tennal joint; fastigium not very steej ly decli- 

 vent, rather de'^ply (male) or very shallowlj' (female) sulcate; frontal 

 costa failing to reach the clypeus, equal or subeiiual, much narrower 

 than the interspace between the eyes, ulcate at and below^ the oc«'lliis 

 particularly in the male, punctate throu^ 'Hit like the rest of the tace 



