104 THE CANADIAN ENTOMOLOGIST. 



One of my species, Pezotettix alba Dodge, seems to exhibit a transition 

 from something still lower. I have an example in which the elytra are 

 barely one-tenth of an inch in length, only half as long as in the typical 

 or common form. In this specimen the cerci are much smaller than 

 usual, although the insect is of the common size. 



I do not yet know whether these variations in wing expanse are com- 

 mon to both sexes or not. I have so far found them only in male speci- 

 mens, but that is no proof that winged females do not also occur. 



Lest any should imagine that I am wrong in determining these long- 

 winged specimens "to be varieties rather than species, I will say that these 

 species of Pezotettix are not liable to be confounded with any Caloptcniis 

 and that the varieties do not, with the exceptions already mentioned, differ 

 in form or color from the types. 



Pezotettix alba is particularly distinct, being white or greenish-white in 

 color, and occurring only upon a native plant whose stems and foliage are 

 also white. This plant, commonly, but incorrectly, called wild sage, grows 

 in clumps many rods apart upon the prairie ; but the insect is never found 

 upon the intervening grass. The winged variety was also found upon the 

 same plant. 



The following shows the comparative length of wing in these 

 varieties : — 



Pez. alba Dodge. Pez. Junius Dodge. 



Variety, $ — Length of elytra, Type, $ — Length of elytra, .40 to 



.10 inch. .45 inch. 



Type, £ — Length of elytra, Type, $ — Length of elytra, .45 to 



.175 inch. .50 inch. 



Type, $ — Length of elytra, Variety, $ — Length of elytra, .70 



.20 inch. inch. 



Variety — Length ot elytra, .50 



or .60 inch. 



Pez. autumnalis Dodge. 



Type, $ — Length of elytra, .20 to .23 inch. 



" $ " " .26 inch. 



Variety " " .70 " 



The Caloptenoids are not more constant in color than other genera 

 of Acrididre, red-legged ones producing blue-legged varieties, and vice- 



