374 
Psyche 
[December 
Blatchley, W. S. 1920. Orthoptera of Northeastern America. Nature Publ. Co., 
Indianapolis, Ind. 784 pp. 
Braun, E. L. 1951. Plant distribution in relation to the glacial boundary. Ohio J. 
Sci. 51:139-146. 
Burmeister, H. 1838. Handb. Ent., 11-Orthoptera. Berlin. 697 pp. 
Caudell, A. N. 1906. The Cyrtophylli of the United States. J. N. Y. Entomol. Soc. 
14:32-45. 
Deevey, E. S. 1949. Biogeography of the Pleistocene. Part I, Europe and North 
America. Geol. Soc. Amer. Bull. 60:1315-1416. 
Fabricius, J. C. 1775. Systema entomologiae sistens insectoium, synonymis, locis, 
descriptionibus, observationibus. Flensburgi et Lipsiae. 832 pp. 
Fowells, H. A. 1965. Silvics of forest trees of the United States. U. S. Dept. Agr. 
Handb. 271. 762 pp. 
Froeschner, R. C. 1954. The grasshoppers and other Orthoptera of Iowa. Iowa 
State J. Sci. 29:163-354. 
Hebard, M. 1941. The group Pterophyllae as found in the United States (Tetti- 
goniidae: Pseudophyllinae). Trans. Amer. Entomol. Soc. 67:197-220. 
Kemp, J. W. 1979. Taxonomy, distribution, and zoogeographic evolution of 
Grylloblatta in Canada (Insecta: Notoptera). Can. Entomol. 111:27-38. 
Kirby, W. and W. Spence. 1828. Introd. Ent. 5th ed. London. 607 pp. 
Kirby, W. 1906. Syn. Cat. Orth. II. Orthoptera Saltatoria, Pt. I. London. 562 pp. 
Lloyd, M. and H. S. Dybas. 1966. The periodical cicada problem. II. Evolution. 
Evolution 20(4):466-505. 
North, R. C. 1978. Pterophylla camellifolia (Fabricius) (Orthoptera: Tettigonii- 
dae) in Iowa: Variation in distribution, morphology and calling song. Master’s 
Dissertation. Iowa State University. 39 pp. 
Rehn, J. A. G. and M. Hebard. 1916. Studies in the Dermaptera and Orthoptera 
of the coastal plain and Piedmont region of the southwestern United States. 
Proc. Acad. Nat. Sci. Phil. 68:187-338. 
Shaw, K. C. and O. V. Carlson, 1969. The true katydid, Pterophvlla camellifolia 
(Fabricius) (Orthoptera: Tettigoniidae) in Iowa: two populations which differ in 
behavior and morphology. Iowa State J. Sci. 44:193-200. 
Shaw, R. W. and P. J. Waite. 1964. The climate of Iowa. Iowa State Univ. of Sci. 
and Tech. Agr. and Home Econ. Exp. Sta. Special Report No. 38. 
Simonson, R. W., Gichen, F. F. and G. D. Smith. 1952. Understanding Iowa 
soils. W. C. Brown Co., Dubuque, Iowa. 
Smith, R. W. 1957. An analysis of post-Wisconsin biogeography of the prairie 
peninsula region based on distributional phenomena among terrestrial verte¬ 
brate poulations. Ecology 38(2): 205—218. 
Smith, R. W. 1965. Recent adjustments in animal ranges. In H. E. Wright and D. 
G. Frey, eds. The Quaternary of the United States, pp. 633-642. Princeton Univ. 
Press, Princeton, New Jersey. 
Thomas, E. S. 1951. Distribution of Ohio animals. Ohio J. Sci. 51:153-167. 
Transeau, E. N. 1941. Prehistoric factors in the development of the vegetation of 
Ohio. Ohio J. Sci. 41:207-211. 
Walden, B. H. 1911. The Euplexoptera and Orthoptera of Connecticut. Connec¬ 
ticut State Geol. and Nat. Hist. Surv. Bull. No. 16. 169 pp. 
