4 2 Uniicrsity of Michigan 



Acrydiuin hancocki (Morse). — Lake Upsilon, Turtle Movin- 

 tains, Aug-. 4, 1920, i male. 



A single male was found in a small opening among the wil- 

 lows and aspens growing along the upper margin of the beach 

 of Lake Upsilon, on a patch of nearly bare earth scattered 

 with dead leaves and twigs and with occasional small patches 

 of moss. An hour's search in the vicinity revealed no other 

 specimens. 



Tryxalixae 



Pseudopomala hrachyptera (Scudder). — Medora, July 31, 

 1920, I juvenile male; Amidon, Aug. 25, 1920, i male. 



The immature male from Medora was taken among scanty 

 vegetation on the flood-plain of the Little Missouri River. 

 The Amidon specimen was beaten from a thicket of herbaceous 

 plants and bushes (among which wild roses were conspicuous) 

 forming a growth about four feet tall, in the head of a gully 

 in the "breaks" of the Bad Lands. It was the only one found, 

 in spite of a considerable amount of collecting in this vicinity. 



Acrolophitiis hirtipes (Say). — Buford, July 23, 1920, 3 

 males; Amidon, Aug. 25, 1920, i male. 



At Buford this species occurred in small numbers on a dry 

 liillside among a scanty growth of xerophytic vegetation. The 

 single specimen taken at Amidon was found on the edge of 

 the Bad Lands among scattered clumps and patches of grass 

 and sage-brush on the nearly bare, dry clay soil. When in 

 flight it has considerable resemblance to Spharagemon collare, 

 with which it was associated both at Buford and at Amidon. 



Eritettix tricarindtus (Thomas). — Devils Lake, Aug. 26, 

 1919, I juvenile male. 



A single nymph of this species was taken by Miss Olson 

 ■on the dr}', grassy slopes of Sully's Hill. 



