THYSANOPTERA AND ORTHOPTERA. 223 



August 12. 



On bare ground and in short l)lue grass in damp woods. 

 Tettix omatus (Say). 



August 12. 



Open grassy spot in edge of damp woods. 

 Tettix hancocki ]\Iorse. 



June 15. 

 * On sandy grass plot. 



Tettix immature, probably omatus (Say). 



July 30 to August 12. 



Short grass in open woods or fields. 

 Tettigidea parvipennis (Harris). 



August 12. 



Open grass-plot in edge of damp woods. 

 Tettigidea parvipennis pennata Morse. 



June 22 to July 1 . 



On sand beaches with or without vegetation. 



Subfamily Tryxalinae. 



Pseudopomata brachyptera Scudder. 



Immature June 23; adults June 27 to July 21. 



In open woods, in patches of tall grass, and on grassy sand dunes. 



The males were often found in song, especially in the morning. 

 They usually perched on some dead grass stem, drew up the tibiae 

 against the femora like a folding pocket-rule, and scraped the leg up 

 and down over the wing covers. This is the common method of 

 stridulation in the suborder Tryxalinae. The rate of stridulation 

 varied in tnis species from 5i to 9 double strokes (up and down) per 

 second, and some twenty complete vibrations were made in succes- 

 sion, followed 1)y a period of rest about half as long. 

 Pseudopomata brachyptera reversa Morse. 



July 6. 



Grassy sand dunes. 



Unhke the preceding form, all the specimens of this variety 

 alighted on green and not dead stems. 

 Orphulella pelidna (Burmeister). 



Julv 14. 



On bare sand in open, partially grass-covered woods. 

 Chloealtis conspersa Harris. 



June 25 to July 23. 



In grassy places, either in the open or in open woods, on sandy 

 or humous soil, wet or dry locations; on bare sand or on gravel, and 

 on sparsely vegetated sand ridges. 



