MORGAN HEBARD 157 



cipal sulcus (thus quite different than the normal for the brachypterous 

 members of the genus except those of the Immunis Group). Face, genae, 

 cephalic and median limbs brownish buff. Caudal femora dorsad brownish 

 buff with three slightly darker suffusions, external surface dark brown 

 changing to a garnet brown ventrad, ventral surface brilliant deep nopal 

 red, internal surface dull reddish, genicular areas dark brown. Caudal 

 tibiae glaucous, paler at bases. 



Female much paler and more uniformly colored, dull yellowish brown, 

 caudal femora faintly tinged with reddish ventrad. Caudal tibiae light 

 glaucous, paler at bases. Postocular bar and dark areas of caudal femora 

 subobsolete. 



The immature male, unlike the adults, has the caudal tibiae buff, the 

 caudal femora with a line dorso-proximad and the dorsal half of the ex- 

 ternal pagina black. The other portions are buffy brown, the abdomen 

 dull purplish brown dorsad. 



PART XII. THE INDIGENS GROUP OF THE GENUS 

 MELANOPLUS (Supplement) 



When studying this Group in 1936 I found that I had deter- 

 mined and returned, without examination of the male penis, a 

 pair from Taft, Montana. As I had a large series of indigens 

 digitifer which I was then describing, 8 from as close as Haugan, 

 Montana, I felt justified in so recording that pair but wrote for 

 them to verify my decision. The entire series from Taft is now 

 before me, sent through the kindness of the collector E. R. Buck- 

 ell, and proves to my surprise to represent an undescribed race 

 of the related species payettei Hebard. This species is distin- 

 guished from the others of the Group by the very distinctive 

 penis and the less produced apex of the male subgenital plate. 



Melanoplus payettei picropidzae new subspecies 



(PI. X, figs. 8 to 10; pi. XI, figs. 11, 12.) 



This geographic race may be separated from payettei payettei, 

 known from the mountains of central western Idaho and adja- 

 cent Washington, by the proportionately larger and less divergent 

 furcula, proportionately larger cerci which distad are broader 

 with apex truncate and narrower penis. Females of the species 

 of the Indigens Group possess no striking differences. 



The race may be limited in eastward distribution by the area 

 of the Bitter Root Mountains on the western boundary of Mon- 



s Trans. Amer. Ent. Soc., lxii, p. 178, pi. 12, fig. 9, pi. 13, figs. 4 and 5. 



TRANS. AMER. ENT. SOC., LXIII. 



