2 University of Michigan 



North Dakota is an especially favorable region for such 

 investigations. Three distinct faunal elements meet here : the 

 boreal is found along the northern boundary of the state ; the 

 characteristic fauna of the eastern states is well represented 

 in a large part of eastern North Dakota; and the fauna of 

 the Great Plains and the Rocky ^Mountains is found in the 

 southwestern corner of the state. But although faunistic 

 work was very auspiciously begun here by the early surveys, 

 it was soon neglected, and no paper dealing with the Hemiptera 

 of Dakota has appeared since 1878, when Uhler published his 

 last list of Hemiptera from this region. Only a few isolated 

 North Dakota records have been published since that time, 

 and they are widely scattered in the literature. 



In 1919 the North Dakota Biological Station in cooperation 

 with the Museum of Zoology of the University of Michigan 

 undertook, under the direction of Crystal Thompson, a bio- 

 logical survey of the state, and has continued this during 

 succeeding summers. The continued progress of the work 

 has been made possible through the untiring efforts and gen- 

 erous assistance of Dr. R. T. Young, Director of the State 

 Biological Station. As a part of this reconnaissance, my 

 friend T. H. Hubbell made a collection of insects in various 

 parts of North Dakota during the summer of 1920. About 

 seven weeks were devoted to the field work, and while Hub- 

 bell gave his attention primarily to the Orthoptera, he was 

 able to pick up a goodly number of Hemiptera. His collec- 

 tion, augmented by a number of specimens taken Ijy other 

 collectors, has been submitted to me for determination, and 

 forms the basis of the present paper. 



Mr. Hubbell's itinerary was as follows: From July 19 to 

 July 29 he worked in the region al>out Devils Lake, making 

 short expeditions to Stump Lake (July 24 and 25) and to 



