Occasional Papers of the Museum of Zoology 45 



season, leaving the general shade of the ground stratum very 

 dark. On the other hand, the series from the dune region is 

 of very much lighter coloration, with the dark markings dis- 

 tinct but reduced in size. 



This species v^as taken at Lakeside in August and on Sep- 

 tember 18 by Hancock. 



Psinidia fenestralis (Serville). 



Sawyer Dunes, August 31, 1919, 2 males, i female; July 26, 1920, 



I female. 

 New Buflfalo, September 9, 1920, 16 males, 10 females. 



All of the specimens from the Sawyer Dunes were taken 

 on the edge of a large blowout, in and near the grassy strip 

 along the top of the side w-all, between the steep slope of bare 

 sand and the oak forest w^hich borders the blowout. The spe- 

 cies was rather scarce here. At New Buffalo, however, it 

 was found to be very common among the bunch grass growing 

 on the low dunes and upon an abandoned sand-drifted rail- 

 road grade along their inland margin. Here it occurred in 

 company with Melanoplus angustipennis and Melanoplus i^avi- 

 dus. Specimens were easily captured ; they fly only short 

 distances, usually less than twenty feet, and after being flushed 

 a few times will often remain motionless on the bare sand 

 among the grass clumps, even allowing themselves to be picked 

 up in the fingers. All of the 30 specimens taken are the red- 

 Avinged form. 



Trimcrotropis maritima (Harris). 



Sawyer Dunes, June 22 and 24, 1919, 2 immature specimens ; August 

 31, 1919, II males, 17 females- July 6 to September 6, 1920, 9 

 males, 5 females, 3 immature specimens. 



New Buflfalo, September 2, 1919. 4 males; September 9, 1920, i male, 

 3 females. 



St. Joseph, September 9, 1918, l female. 



This is the most characteristic species of Orthoptera of the: 



