MORGAN HEBARD 173 



At that time ascensor was also placed as a race of oregonensis, 

 but study of the penis shows it to be a race of the closely related 

 marshalli (Thomas). 



The present insect is known only from the Bear River Moun- 

 tains and the Wasatch Mountains of Utah, where it occurs in 

 the Canadian and Hudsonian Zones at elevations from 6400 up 

 to 10000 feet. It is apparently very scarce at the latter eleva- 

 tion and reaches its maximum abundance at distinctly lower 

 elevations than does marshalli marshalli. It is now known 

 from Logan Canyon south to American Fork Canyon. The 

 Uinta Mountains of northeastern Utah, which extend east and 

 west for a great distance, may carry this insect far east of its 

 known range. The area of intergradation with typical marshalli 

 can, however, not be determined until material from the moun- 

 tains of northeastern Utah and northwestern Colorado has been 

 secured. 



The caudal tibiae are very dull weak glaucous, the " pale red " 

 noted by Scudder being attributable to discoloration. 



Only the following material, additional to the described pair, 

 is known. 



Utah: Red Banks in Logan Canyon, Bear River Mountains, 6400 feet, 

 VIII, 10, 1928, (Rehn and Hebard ; very few in areas of " Cow Cabbage " 

 (Wyethia amplexicaulis Nutt.), where Melanoplus utahensis Sc. was abund- 

 ant and also in mountain herbage in open) , 1 $ , 4 $ . Lake Catharine in 

 Wasatch Mountains, 10000 feet, VIII, 19, 1924, (J. A. G. Rehn; granite 

 slopes with firs and patches of Hudsonian Zone vegetation, only specimen 

 seen), 1$. Lake Martha in Wasatch Mountains, 9200 to 9700 feet, VIII, 

 19, 1924, (Rehn and Hebard; scarce in lush Hudsonian Zone herbage with 

 much fir about), 4 # , 8 $ . Big Cottonwood Canyon in Wasatch Mountains, 

 7400 feet, VIII, 18, 1924, (Rehn and Hebard; Canadian Zone, like Melan- 

 oplus utahensis present in moderate numbers in lush herbage near stream 

 on flat with much Aspen and spruce), 2$, 6$. 



Melanoplus oregonensis oregonensis (Thomas) 



1875. Pezotettix oregonensis Thomas, Wheeler's Rept. Expl. and Surv. 



West of 100th Merid., v, p. 888. [ $ ; northwestern United States. 6 ] 

 1897. Podisma oregonensis Scudder, Proc. U.S. Nat. Mus., xx, p. 110, pi. 



7, fig. 10. [$ , 9- : Yellowstone, Montana; Henry Lake, Idaho.] 



6 The original labelling " Oregon " was due to the inexact or inaccurate 

 method often shown on natural history specimens secured on the early 

 government expeditions to the Northwest. 



TRANS. AM. ENT. SOC., LXH. 



