ORTHOPTEKA OF INDIANA. 22d 



The two forms have heen proven by Hancock to interbreed and the 

 measurements intergrade, the following table vshowing the extremes: 



Measurements: Length of body, male, 8.5-12.5 mm.; female, 9- 

 13.5 mm; of pronotum, male, 7.5-10.5 mm., female, 8-12 mm.; of 

 hind femora, male, 4.5-5.5 mm., female, 5-7 mm. 



The ornate grouse locust seems to be rather common in Indiana, 

 having been taken in Crawford, Posey, Marion, Putnam, Lake, Por- 

 ter and Laporte counties. It may be taken any month in the year 

 but in late autumn and early spring is most abundant, being then 

 usually found along the edges of dry open woods and on gravelly 

 hillsides, while in summer it is occasionally found in company with 

 Paratettix cucullatus about the borders of streams and ponds. It 

 sometimes makes its home in grassy plots and lawns, especially those 

 which are wooded, in the outskirts of cities, and is then often seen 

 sunning on the cement and other sidewalks along their margins. The 

 form triangularis more often occurs in sandy localities, and in some 

 places far outnumbers the typical form. 



On a bright sunny afternoon in late November, I once found both 

 forms of ornaius very common on a sloping hillside two miles north 

 of Indianapolis. A clover field was here adjoining an open woods 

 pasture, and the second crop had been cut in October for the seed. 

 Many of the dead stalks had fallen close along the fence row sepa- 

 rating the fields, and here the Tettix were in abundance, their bodies 

 all grayish brown, and corresponding very closely to the dead clover 

 stems; so closely, indeed, that they were not visible until they hopped, 

 and then had to be "marked down" before they were captured. Be- 

 neath the bottom rails of the old fence thjey had found a comfortable 

 abiding place and Mdnter retreat, and on this bright afternoon had 

 been tempted forth to bask in the sunlight and perchance to feed 

 upon the green clover leaves which were yet abundant in places 

 among the dead and fallen stems. 



20. Tettix hancocki Morse. Hancock's Grouse Locust. 



Tetti.r hancocki Morse, 101, YII, ]S99, 200; Scudd., 188, 1900, 16; 

 Hanc, 69, 1902, 81, Plate IV, Fig. 4; Plate XI, Figs. 5, 5a. 



This species is allied to 2\ ornnlus Say, with which it agrees in 

 color, granulation and rugosity of surface, but diifers in its more 

 robust form with wider and generally more projecting vertex, slightly 

 more prominent mid-carina; in the generally more abruptly forked 

 and wider facial costa, and notably in the enlarged middle femora; 

 the expanded portion of the latter in the male being nearly or quite 

 one-half as broad as long (in ornaius seldom more than one-third); 



