164 NEW NORTH AMERICAN MELANOPLI (oRTHOPTERa) 



be a similar race of H. gemmicula, both species here described, 

 but we have no evidence as to this, and it is clear that H. floriden- 

 sis Morse is similarly derived -from a common stock with H. 

 speciosus (Scudder), though still further specialized and no ques- 

 tion of its specific validity now being possible. 



The present species is a member of the Viridis Group, and H. 

 gillettei Bruner represents another geographic race widely dis- 

 tributed over the central Rocky Mountain region. 



We have discussed this question as to values of tegminal 

 differentiation here, to show how absolutely essential it is to 

 judge each case separately. Dogmatic treatment is utterly 

 impossible. 



Type. — &; Milford, Beaver County, Utah. Elevation 4900 

 feet. September 5, 1909. (Rehn and Hebard.) [Hebard Col- 

 lection, Type No. 483.] 



Agrees fully with the type of nevadensis gillettei except in the following 

 characters. Size (averaging in series) smaller. Tegmina grea:tly reduced, 

 slightly shorter than pronotum, sHghtly overlapping, somewhat truncate 

 distad; tegminal form broad ovate, the dorsal field being distinctly defined 

 from the lateral field. 



The type is yellowi.sh bro\Aii in general coloration, the color pattern is dis- 

 cussed below. 



Allotype. — 9 ; same data as type. [Hebard Collection.] 



This specimen agrees fully with the type except in the following features- 

 Size larger. Tegmina broadly quadrato-ovate, due to the somewhat greater 

 distal truncation; separated from each other by a brief interspace. 



The allotype Ls brilUantly colored, with color pattern intensive as discussed 

 below. General coloration dull green-yellow (a bright color). 



Measurements {in millimeters) 



Type. 

 Paratype. 

 Caliente, Nevada 



(4). 12.9-1.3 3.1-.3.2 3.8-3 1.5-1 



