340 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



and narrower, as well as less coriaceous, tegmina of parvipennis, 

 the generall}'' narrower dorsum of the pronotum and the more 

 elongate, yet relatively more inflated, caudal femora of the same 

 race. There is some individual variation in the length and 

 robustness of the styles of the male subgenital plate and also of the 

 ovipositor in both forms. 



The distribution of this race covers an area extending from the 

 lower country of western Arkansas (Rich Mountain Station) and 

 south central Oklahoma (Ardmore), south to at least Lavaca 

 County, Texas. We have no information as to the eastern and 

 western limits of typical parvipennis, but as shown under r. 

 rotundifolia intermediates showing a great tendency toward 

 r. parvipennis occur in the southeastern states. 



Specimens Examined: 7; 4 cT, 2 9,1 9 n. 



Rich Mountain Station, Arkansas, VIII, 2, 1905, (Morse), 1 9, [Morse 

 Cln.]. 



Ardmore, Oklahoma, VI, 1, (C. R. Jones), 1 6", [U. S. N. M.]. 

 Texas, (Belfrage), 2 cf, [M. C. Z.]. 



Dallas, Texas, (Boll), 1 cT n., [M. C. Z.]; 1 d^, [U. S. N. M.]. 

 Lavaca County, Texas, VI, 21, 1 9, [U. S. N. M.]. 



Amblycorypha rotundifolia iselyi Caudell (Pi. XI, fig. 39; pi. XII, figs. 



48 and 57.) 



1904. Ambhjcorypha iselyi Caudell, Journ. New York Entom. Soc, 

 xiii, p. 50. [Wichita, Kansas.] 



The relationship of r. iselyi to r. parvipennis and r. rotundifolia 

 is very evident to anyone examining the series of specimens of 

 the three forms studied by us. As stated above the direct rela- 

 tionship of r. iselyi and r. parvipennis is close, although we have 

 no positive proof of the assumed intergradation. We have given 

 above under r. parvipennis the important differential characters 

 separating this form from its relatives. 



The range of rotundifolia iselyi extends from northwestern 

 (Little Rock) and central (Dallas County) Iowa, south to eastern 

 Missouri (Iron Mountain) and south-central (Wichita) Kansas. 



Specimens Exartiined: 7; 4 cf , 3 9 . 



Little Rock, Iowa, VII, 16, 1893, (E. D. Ball), 1 d^, [A. N. S. P.). 

 Ames, Iowa, (E. D. Ball), 1 d^, 2 9 , [A. N. S. P. and Hebard Cln.]. 

 Dallas County, Iowa, VIII, 20 to 23, (Allen), 1 d^, [M. C: Z.]. 

 Wichita, Kansas, VII, 29, 1904, (F. B. Isely), 1 d", Paratypc, [Hebard 

 Cln.]. 



Iron Mountain, Missouri, 1 9, [Hebard Cln.]. 



