lo University of Michigan 



but rarely in Xorth Dakota (cf. Bull. 34. X. D. Agr. Exp. 

 Sta., 1898, p. 294). It was not taken by Hubbell. 



Geocoris hnUatus hulldtus (Say). — Seven specimens are in 

 the collection. Three are from Devils Lake fjuly 19 and 

 August 13), two are from the Turtle Mountains (July 30. 

 August 6), one from the Sheyenne River, and the other from 

 the summit of Black Butte, which rises from the plains south 

 of Amidon. Uhler (1878, p. 505) lists this species from 

 Pembina. 



''■'Geocoris iiliginosus iiliginosus (Say). — One specimen was 

 found in company with numerous Saldidae, on the shore of 

 East Bay at Devils Lake, where the mud is covered with a 

 thin saline crust from the evaporation of the strongly alka- 

 line water. Uhler (1876) lists this form and the variety 

 limbatus Stal as occurring in "Dakota." 



'^Sphcerohius insignis (Uhler). — One individual was brought 

 from the summit of Black Butte, August 21, and three were 

 taken in the Turtle Mountains, August 6, where they were 

 running about on the ground in a dry field. 



*Zeridoneus costalis (Van Duzee). — One specimen was 

 taken from the vegetation beside the Bois de Sioux River at 

 Fargo, August 31. 



*Ligyrocoris diffusus Uhler. — The collection contains three 

 specimens from Amidon, one from the Turtle Mountains, and 

 one from Fargo. 



*Ligyrocoris sylvestris (Linne). — Nine specimens were col- 

 lected in the Turtle Mountains, July 30 to August 6. 



'*Peri\trechus fraternus Uhler. — Two individuals were col- 

 lected from a dry pasture at Bottineau; and thirty were taken 

 at a lighted sheet in the grassy yard of the Devils Lake Bio- 

 logical Station, on the ver}^ warm evening of August 8. 



