THE CLIMAX FOREST AND ITS PREDECESSOR 231 



FIG. 322. Round- winged katydid, 

 A mblycorypha rotundifolia; b, tip of ovi- 

 positor. After Blatchley. 



which may be mentioned the tree crickets, Oecanthus angustipen- 

 nis, O. fasciatus, and O. nivens (Fig. 300), and the round- winged 

 and oblong-winged katydids (Figs. 322, 323); the short-winged 

 locust, Melanoplus scudderi, the sprinkled locust, Chloealtis con- 

 spersa (Fig. 383), the s worded 

 grasshopper, Xiphidium ensi- 

 ferum, the woodland grass- 

 hopper, Xiphidium nemorale. 



The tree crickets are gauzy- 

 winged, pale green insects, 

 whose stridulations make much 

 of the insect music of late- 

 summer nights. The oft-repeated buzzing notes, sounding in 

 unison, with regularity, give a rhythmic pulsing volume of 

 sound that keeps up from dusk to long past midnight. The short- 

 winged locust is nearly 

 an inch long. The color 

 is reddish brown; the 

 hind tibiae are bright 

 red. The wing covers 

 are short, about as long 

 as the pronotum, the 

 wings still shorter. 

 Grasshoppers of the 

 genus Xiphidium are 



FIG. 323. Oblong- winged Katydid, Ambly- 

 rorypha oUongifolia. After Blatchley. 



small, but have a long 

 ovipositor. The top of the head projects forward as a rounded 

 prominence. The two species mentioned have bodies about 

 one-half inch long and are greenish brown in color. The 

 ovipositor of the sword ed grasshopper is as long as the body; 

 that of the woodland grasshopper is shorter and curved. 



