228 riiOCEEDINdS OF THE yATlUSAL ML':<EiM. volxx. 



liiiid femoni luteo- or lerrujjjineotcstaceoiis, very oblitjuely niul broadly 

 bitUsciiite witli blackish fuscous above iind outside, with a basal patch 

 of the same, the whole sometimes re<biced to mere clouds, the genicu- 

 lar arc and sometimes the whole geuiculatiou blackish fuscous; hind 

 tibiae wholly red, the spines black except at base, ten to thirteen iu 

 number in the outer series. Extreuuty of male abdomen a little cla- 

 vate, upturned, the suinaanal i>latc snnill, snbclypeate, much lon.uer 

 than broad, the lateral margins elevated a little and broadly on the 

 basal half, the apex subrectangulate, a little nmnded, the median 

 sulcus not de«'i), i>ercurrent, with sharp but low bounding walls in tiie 

 basal half; furcula consisting of a i)airof subparalh'l, slender, tapering, 

 acuminate, thitlened lingers, seated on rather tumid bases (forming 

 part of the last dorsal segment), lying outside the ridges of the sui)ra- 

 anal ])late, and extending about halfway across it; cerci snmll feebly 

 falciform lamellae, tapering on the basal half only an I well rounded at 

 tip, gently incurved and almost as long as the su[)raanal plate; infra- 

 cereal plates large, scarcely longer than the snp'aanal plate, almost 

 com])lctely concealed by the recumbent cerci; subgenital plate small, 

 broad hnt longer than broad, snbpyramidal, being apicallycom])ressed, 

 the apical margin slightly elevated and subtubercular, entire. 



Length of boily {}[. d, telhi.stns'^, male, 10 mm., female, 18.5 mm.; 

 antennae, male, 7.5 mm., female, 0.25 mm.; tegmina, male and female, 

 5.-J5 mm. : hind femora, male, 1) mm., female, 1(>.5 mm. Length of body 

 {}[. (1. coHtpJetfts)^ male, 14.5 mm., female, 17.5 mm.; antennae, male. 7 

 mm., female. mm. (est.); tegmina, male, 15 mm., female, 10 mm.; hind 

 femora, male, 8.75 mm., female, 10 mm. 



Thirty four males, 41? females. Fort McLeod, Alberta, Canada, 

 August (L. Bruner; U.S.X.M. — Ifiley collection); Souris River, Assini- 

 boia, G. M. Dawson; Montana (U.S.N.M. — Ifiley collection); Dakota 

 (same; S. II. Scudder); Clitlbrd, Traill County. North Dakota (L. 

 Bruner); Custer, Black Hills, South Dakota, Bruner (II.S.N.M.— Kiley 

 coUecticm); Wyoming, Morrison (same); St. Paul. Minnesota, August 

 27, Whitman (same); Red River, ^Manitoba, R. Kennicott; Dallas 

 County, Iowa, August, J. A. Allen; Jefferson, (Ireene County, Iowa, 

 July 20-24, Allen ; Crawford County, and Denison, Crawford County, 

 Iowa, July 10-24, Allen ; Nebraska, I )o(lge ( T.S.N.M. — Riley collection ; 

 S. Ilenshaw; S. II. Scudder); Lincoln, Lancaster County, Nebraska, 

 Septend)er (L. Bruner); Fort Robinson, Dawes County, Nebraska, 

 August 21, Bruner (U.S.N.M. — RiU^v collection); Colorado, Morrison 

 (same; S. II. Scudder); Northern New Mexico, Lieutenaut Carpenter 



Allen found the species iu Iowa iu grass on prairies. 



There are two very distinct forms of this S])ecies, dittering however 

 only in the length of the organs of Hight, the tegnnna being abbreviated 

 and subacuminate at tip iu the form ^f. <1. iellustris (retaining the 

 second oldest name tor the form incapable of flight), and fully developed, 

 broad and ample, greatly surpassing the hind femora and well rounded 



