137 



from till our other North American Pezotettigi that I am of the opinion it 

 should be separated from them and placed in a genus by itself. It has 

 been described by Dodge as Pez. autumnalis and also as Caloptenus volucris. 

 The latter name was given to a long-winged variety that occurs at various 

 points in Nebraska, but especially along the valleys of the Platte and its 

 tributaries. 



This peculiarity of variation in length of wing is not confined to this 

 species alone, but belongs to quite a number of other grasshoppers or 

 locusts, both in this country and in Europe. In most instances where this 

 variation occurs, the species have been described under several names, and 

 not unfrequently are the two forms of the same species placed in different 

 genera, as for example the present species. The form of the male cerci 

 and that of the spine on the prosternum, as a rule, will indicate the rela- 

 tionship of the two forms, even if all the other members have become so 

 differentiated, through either lack of use or new uses, as not to be recog- 

 nized. 



74. Dactyiotum pictiim Thos. Barber Co. and Great Salt Well of 

 Crooked Creek Valley, forty miles southwest of Dodge .City (Cragin). 



This is our most beautifully colored locust, and can well be styled the 

 "Union or Patriotic Grasshopper" since it wears the stripes, if not the 

 stars, of the most glorious flag that floats. It occurs at various localities 

 in Dakota, Nebraska, Colorado, and Kansas, but usually prefers the slopes 

 of rather high hills somewhat devoid of vegetation. I found it by far the 

 most numerous at Golden, Colorado, at an altitude of about 7,000 feet above 

 sea level. 



75. n< SJM i ..i, < n x x ii i, MS Thos. Barber Co, (Cragin). 



This insect is common throughout the region known as the plains, and 

 appears to prefer certain plants upon which to rest and feed. Among these 

 I have noticed more particularly a small composite flower near the Bigelovia 

 yraveolem or Rabbit Bush. This locust also occurs as far eastward as 

 Iowa, and westward to the Salt Lake Valley, where it is replaced by another 

 species that is undescribed. 



76. M.I;. n..,. IMS femiir-rubriim Do (Jeer. Reno Co. (L. A. and H. P. 



O'Hara); McPherson Co. (Rundstrom); Topeka (Cragin). 



This is one of our most widely distributed locusts, and wherever found 

 appears to be rather common at times even numerous.* It has been re- 

 corded as occurring in Mexico, Florida, Canada, British Columbia, Cali- 

 fornia, and all intermediate points. It also occurs at Great Bear Lake, 

 British America. Nowhere are there specimens to be found with other 

 than red tibiae. 



77. MeiaiiopiuM aiiaiii* Riiey. Labette Co. (Newlon) ; Topeka (Cragin) 

 This is the lesser migratory locust of the United States and adjoining 

 portions of British America. It, like fem/ur-rubrum, is very widely dis- 

 tributed over North A.merica, specimens occurring as far southward as the 

 Gulf of Mexico and northward to Alaska, and from ocean to ocean. Un- 

 like the preceding, it is not everywhere present, but appears to occur in 



*It is, this season at least, our most common species at Topeka. [F. W. 



CltAGJN. 



