90 TETTIGID.^. OF NORTH AMERICA 



Co., Ind. (Blatchley); Montello, L. Puckaway, Wis. (Han- 

 cock); Lawrence, Kan. (Kahl); Atherton, Mo., and Kansas 

 City. Mo. (Adams); St. Anthony Park, Minn. fLugger); 

 Toronto, Can. (Walker). 



Tettix gibbosus, Hanc, Trans. Am. P>nt. Soc, xxiii, 



239, 240, pi. 6, figs. 5, 5a (1896); Scudd., Cat. Orth. U. S., 

 16 (1900); Scudd., Index N. Am. Orth., 318 (1901). 



Tettix fluctuosus, Hanc, Trans. Am. Ent. Soc, xxiii., 



240, pi. 7, figs. 6, 6a (1896); Scudd., Cat. Orth. U. S., 16 

 (1900); Scudd., Index N. Am. Orth., 318 (1901). 



Tettix decoratus, Hanc, Trans. Amer. Ent. Soc, xxiii, 

 240, 241, pi. 7, figs. 7, 7a; pi. 9, fig. 31 (1896); Scudd., Cat. 

 Orth. U. S., 16 (1900); Scudd., Index N. Am. Orth., 318 

 (1901). 



Tettix fluctuosus, Hanc, and Tettix dtcoratus, Hanc, 

 (Plate v., Figs. 6, 6a) are varieties of gibbosus, and are not 

 sufficiently constant to give them specific rank, 



HABITS. 



Heavy rain August 23d drenched the country (3,65 inches was the fall in Chicago). 

 The rain had the effect of driving the Tettigids away from the immediate margin of the 

 river to open woods just beyond, to the east of this point at Riverside. The author on 

 hands and knees searched the grounds. One male Tettigidea p. pennata and two long- 

 winged Tettix coming under the form oi ftitctiiosits var.. the other (?(5j£-z^r/cj- were found. 

 Males of gibbosus in large series were taken. The variety of coloring, as usual, was most 

 interesting. One specimen of Tetdx nearly full grown had the upper surface of dorsum 

 and lobes grayish white. It was found on the ground among dried bleached vegetation of 

 the same general color; the legs were reddish. Another specimen Tettix gibbosus, marked 

 very much like the preceding, was brighter. Two specimens nearly full grown were gray 

 on the dorsum, and with obscure black spots and an oblique pure white spot on each side.— 

 Riverside, III., August 25, 1S95. 



The rank growth of grass and wild rice with other vegetation at the margin of the 

 river seems to drive the Tettigids into the timbered soil back from the river to a distance of 

 one hundred feet or more. This does not apply to Paraiettix, but especially to Tettix. At 

 the roots of large oak trees where the soil was interspersed with fine gravel, a number of 

 Tettix gibbosus v/eie found. — Riverside, 111.. August iS, i8g6. 



At Winnetka, 111., the author caught over a hundred Tettix in an effort to discover the 

 variations possible in a given species. Some streets running north and south were little 

 used, and on the east side the ground between the sidewalk and street was the strip furnish- 

 ing the material above mentioned. I discovered that the Tettigids could easily be fright- 

 ened from the ground onto the walks, where they were slightly more conspicuous, and more 

 easily caught. Most of them were taken in this way. The sidewalks skirt the dense woods 

 here, which in the spring are swampy. Recent drainage (within four years) has caused many 

 of the wet places to disappear, destroying at the same time many haunts of animal life. 

 Among the Tettigidse I found Tettix gibbosus, a woods-loving species, most common. The 

 soil is light clay covered with weeds, mosses, lichens, and the other usual flora common to 

 damiJ situations. The genus Tettigidea was also re|)re5ented. One of the interesting points 

 brought out was the variety of coloring presented by Tettix gibbosus, which is herewith 

 appended: 



