Grasshoppers of Kansas. 35 



Melanoplus differ entiplis Uhler. 

 This is one of the largest and most common of the species of the 

 Melanopli. It is a heavy, rather clumsy insect, and together with M. 

 birittatus is usually referred to by the average person as "the big yellow 

 grasshopper." "The frontal costa is generally equal, but rather fre- 

 quently slightly expanded at the ocellus. Angle of hind margin of meta- 

 zona somewhat more obtuse in the male than in the female; the trans- 

 verse sulci of the pronotum are deeply marked with fuscous on the lateral 

 lobes, and especially at the middle sulcus. In the insects of this species 

 in which the ground color is light or yellowish testaceous there is a strong 

 tendency to marbling of the face and pronotum with darker testaceous, 

 which is frequently localized in three quarters: first, as two diverging 

 stripes upon the vertex; second, as irregular clouds upon the face; third, 

 as spots principally upon the disk of the pronotum, whose outlines follow 

 but do not coincide with those of the blackish fuscous of the sulci." The 

 tegmina extend considerably beyond the tips of the hind femora in many 

 of the female specimens. 



Measurements in Millimeters. 



Length of body: 



Male : 27.0-40.0 



Female 29.0-45.0 



Tegmina: 



Male 23.0-35.0 



Female 23.0-38.0 



Antennae: 



Male 14.0-20.0 



Female 11.0-17.0 



Hind femora: 



Male 15.0-20.0 



Female 16.0-23.0 



Localities. This species is found everywhere in the state, and often 

 occurs in large numbers and causes considerable damage. 



Melanoplus bivittatus Say. 



The description of this species in Scudder agrees very well with our 

 specimens. Although there occurs quite a little variation in the length 

 of the tegmina, especially in the female, we have never noticed any 

 dimorphism in this line. In size this species agrees well with M. differ- 

 entialis. 



Measurements in Millimeters. 



Length of body: 



Male 22.0-36.0 



Female 32.0-46.0 



Tegmina : 



Male 18.0-27.5 



Female 21.5-33.0 



Antennae : 



Male 13.0-18.0 



Female 12.5-17.0 



Hind femora : 



Male 13.5-18.5 



Female 17.0-24.0 



