256 riKK i:i:iusiis uf the xatioxal mi ski m. vui..xx. 



between mesostenisil lobes (piadratc (male) or very transverse but nar 

 rower than the lobes (female). Tejrmina abbreviate, jjenerally a little 

 lon^^er than the pronotuin, sli}4:htly overlapjiing, elliptical, apicaily 

 rounded, more than twice as long as broad, brownish fnseous. Fore 

 and middle femora considerably tnmid in the male; hind femcna mod- 

 erately slender, tlavous, sometimes more or less ferruginous, obliquely 

 bifasciate with brownish or blackish fuscous, witli a large blackish 

 genicular patch; hind tibiae pale green or glaucous, pallid or pale 

 riavous at the base, with a dusky patellar spot, the spines black in 

 more than the apical half, nine to ten in number in the outer series. 

 lOxtremity of male abdomen clavate, much recurved, the supraanal 

 })late triangular with acutangulate ai)ex, rather tlat, the median sulcus 

 broad, equal, shallow and percurrent, lying between low ri<lges which, 

 as well as the sulcus, arc interrupted mesially; furcula consisting of a 

 l)air of small, distant, triangular denticulations; ceni long an<l rather 

 slender, erect and gently incurved, tap« ring gradually from base to 

 middle, which is about two thirds as broad as the base, beyond almost 

 ei|ual but feebly enlarged, slightly produced interiorly at the ai)ex, an<l 

 the whole apical subequal portion feebly decurved; subgenital j)late 

 somewhat longer than broad, sube<iual, apicaily elevated slightly and 

 produced to a delicate conical tubercle. 



Length of body, male, 1<» mm., femjile, 21. ■> mm.; antennae, nmle, !)."> 

 mm., female, mm.; tegmiua, male, 5 mm., feiaale, 5.25 mm.; hind 

 femora, male, 8.5 mm., female, 11.75 mm. 



Twelve males, 13 females. Illinois, Uhler; Hock Island, Illinois, 

 Walsh; Moline, Kock Island County, Illinois, J. McXeill; Ogle County, 

 Illinois, .lune 20, J. A.Allen; Riviere de Pare, June 14, L. Bruuer: 

 Vigo County, Indiana, May 25, June 8, 11, lUatchley (W. S. Blatchley: 

 A. P. Morse). A specimen in the U. S. National Museum from .Montana 

 perhaps belongs here. 



It has also been reported by McNeill from McLean County, Illinois, 

 and Monroe County, Indiana. 



This species is remarkable for the length of the antennae. It matures 

 very early, McNeill having taken it as early as June 5 in Illinois, wherr 

 he thinks it is the first Orthopteron to mature from eggs of the same 

 season. Blatchley records it in Indiana even as early as May 11. 

 McNeill says "it is by no means common, . . . being restricted to 

 a few localities [about Moline]. It shows a decided preference for the 

 sides o'' open, grassy ravines."' One specimen before me is marked by 

 Blatchley as found in woods. 



The species has never before been described, but has been mentioned 

 by Walsh's names in several publications; the specific name '' viridu 

 lus'' used on one or two occasions was a misreading of Walsh's name 

 ''viridicrus," and probably originally due to bad chirography on my 

 part. 



