240 IOWA ACADEMY OF SCIENCES. 



TracJiyrhachis cincta Thos. Common on sandy places and 

 southern slopes from the middle of July until late in the fall. 



Trimet'otropis citrina Scudd. Rather rare. Iowa City and 

 Ames. 



ACRIDIAN^. 



Brachistola magna Girard. Only found in the western part of 

 the state. 



Schistocerca americana Drury. Lee county. Probably occurs 

 throughout the southern part of the state. 



ScJiistocerca alutacea Harr. Isolated individuals have been 

 found from the middle of August on through September. 



Schistocerca emarginata Uhl. Common along railway embank- 

 ments and in hazel brush thickets in August and September. 

 Either a very distinct variety of the above or else another 

 larger species, with bright red or yellow hind tibia3, and sharply 

 defined black lines under the eyes, was found very commonly 

 in a low marshy place overgrown with willows the last of Sep- 

 tember. 



Hesperotettix pratensis Scudd. Rare. A few examples taken 

 from the sides of the gravel knoll from August 4th to Sep- 

 tember 3d. 



Melanopilus scudderi Uhl. Common in dry open woods in 

 August and September. 



Melanoplus occidentalis Bruner. Tuis and the two following 

 species included for the western part of the state on the author- 

 ity of Professor Bruner. 



Melanopus gracilis Bruner. 



Melanoplus albus Dodge. 



Melanoplus differentialis Thos. Common about roadways and 

 margins of fields. Adults from August through October. 

 Sometimes quite destructive to corn. 



Melanoplus Mvitattus Say. Common as adults from July till 

 October. 



Melanoplus packardi Scudd. One specimen August 1st. 



Melanoplus daivsoni Scudd. High open woods. Adults were 

 taken from June 6th until July 7th, this season. 



Melanoplus angustipennis Dodge. Iowa City and Ames. 

 Taken from an opan woods and along the margin of an adjoin- 

 ing corn field, from the middle of August until the last of Sep- 

 tember. 



Melanoplus minor Scudd. Rare. A few specimens taken 

 August ILth. 



