•0.1124. SEvisfoy (tF rni: m ei.asovusvvdder. Ill 



walls; furcul.i (MHisistin^ of a pair of parallel or fiu'hly <Iiverjjent, flat- 

 tened, sleiuler, taperin;;, blunt ly ai'iiminate tiiij;ers nearly half as lonj; 

 as the Hnpraanal plate; eerci suhetiual eotnpressed ianiinae, a little more 

 than twice as lonjj as broad, neaily strai^jht hnt teehiy annate and 

 feebly incurved, not so lonji; as the supraanal plate, well rounded 

 apically, soujctiincs feebly dimpled apically on the «'xterior surface; 

 snb;:e»iital plate of eijual lenj;th and brradth, bioadly subconical, the 

 apical mar;;in sli;;htly elevated and subiubrrculate. 



Length of body, male, 17 mm., female, IH mm.; antenna*, male, 

 4>.75 mm., female, O.Ja mm.; te<;'mimi, male, 4.75 mm., female, ~> mm.: 

 hind femora, male, U) mm., female, II. 7r) mm. 



Fourteen nudes, 21 females. Idaho (I'.S.N.M. — Kiley collection); 

 Henry Lake, Idaho, Aujiust (same; L. Bru?)er); Yellowstone, Mon- 

 tana (U.S.N.M. — iiiley collection); Fort McLeod, Alberta, Aujijust 

 ^same; L. Hruner.) It was orijjinally described by Thomas from 

 Oreffou. 



Thomas's text refers to an illustration on a plate, but another species 

 was there substituted for it. Ilis types do not appear to exist, but I 

 think there can be little dcmbt that this is his species, his description 

 ap^reeing exceptionally well ami certainly applyinj^- to no other insect I 

 have seen. I am also drawn to this com-lusiou by notes taken many 

 years ago upon examination of his ty[)es. 



ANALYTICAL KEY TO THE OL'> V liLI) SPECIES OF PODISMA. 



A'. Sabgenitiil ])Iate of male uormul, its sci^L from above at least as loug as broad, 

 apiciilly narrowiug (Pcxlisma, s. 8.). 

 hK Tegmina absent. 

 f'. Sides of first abdominal segment with uo distinct tym])annm. 

 d'. Disk of pronotum smooth, at b'ast on ])rozona. 

 «'. Hind tibiae red; lobes of male furcnla very distant; cerci very short, 

 styliform, acuminate; subgenital plate not prolonged beyond its apical 



margin 9. pedemontana (p. 112). 



e^. Hind tibiae lutescent; lobes of male furciila attingent; cerci raoder- 

 ^ ately long, siibcompressed, slightly dilated apically; subgenital plate pro- 

 longed as a tubercle beyond its apical margin 10. cobellii (p. 113). 



d^. Disk of pronotum rugulose throughout. 



c'. Hind femora pallid beneath; hind tibiae rufescent... 11. cosfae (p. 113). 



e^. Hind femora red or reddish beneath ; hind tibiae sordid blue. 



/'. Pronotum of female enlarging but little posteriorly; lobes of male 



furcula stout though sumll, rounded; subgenital plate as bioad as long, 



the apical margin broadlj' rounded, with a feeble, indistinct, and blunt 



tubercle 12. parnaasica (p. 113). 



/-. Pronotum of female enlarging posteriorly rapidly and considerably; 

 lobes of male Ir.rciila slight and minute, elongate; subgenitai ]>late much 

 longer than broad, the apical margin angulate, with a small l>nt dis- 

 tinct and slightly- elevated tubercle 13. pyrenaea (p. 114). 



c'^ Sides of first abdominal segment with a distinct tympanum. 

 f/'. Hind tibiae flavo-olivaceous : lateral halves of last dorsal segment of male 

 widely separated; cerci tapering almost regularly throughout, equal for a short 

 <listance beyond the middle; subgenitjil plate elongate, its apical margin sub- 

 angulate as seen irom above 14. %alamandra i^. 114). 



