36 University of Michigan 



margins. A single male was found on a patch of wet, tram- 

 pled mud in the margin of a sedge marsh in a cleared ravine 

 near the Warren Woods Preserve. 



ACRIDIDAE 

 TRYXALINAE 



Tryxalis brevicornis (Linnaeus). 



Warren Woods, August 30 to September 3, 1919, 5 males, 2 females, 



1 immature specimen ; September 5 to 7, 1920, 9 males, 9 females. 

 Three Oaks (Klute's lakes), September 4, 1920, 15 males, 11 females. 

 New Buffalo, September 2, 1919, i male. 



Common, frequently abundant, in the sedge and lizard's tail 

 marshes of the region during the latter part of the season. A 

 few specimens were also taken in the reed marsh at New 

 Buffalo and in moist meadow pastures in the vicinity of the 

 Warren Woods Preserve. Recorded by Hancock from Lake- 

 side, where he found it usually associated with the lizard's 

 tail (Saumnis cemuus L.). 



Pscudoponiala brachyptera Scudder. 



Warren Woods, July 16 to September 7, 1920, 4 males, 4 females, 



2 immature specimens. 



This species was quite common in a marsh in one of the 

 cleared ravines on the Warren Woods Preserve. This marsh 

 is filled with grasses and sedges, with occasional clumps of 

 cat-tails in the wettest spots ; the drier margins are covered 

 with tall grass and teasel. All the specimens were taken in 

 the wetter parts of the marsh, where in many places water 

 was standing about the roots of the plants. 



The usual stridulation of this species is rather slow and 

 regular, consisting of from two to four strokes per second, 

 repeated from five to fifteen or twenty times. On July 16 a 

 pair was taken in copula on the base of a tall clump of grass 

 at the edge of a small trampled space among the sedges. This 



