1978] 
Morris & Gwynne — Cyphoderris 
165 
reasoning their songs should have diverged yet this is not the case. 
Any difference between these two species (including the above 
mentioned habitat differences) apparently have not affected their 
pair forming signals. 
Acknowledgements 
These studies were supported by operating grant 4946 from the 
National Research Council of Canada. Appreciation is extended to 
the many persons who provided us with access to specimens: R. D. 
Alexander (Univ. of Michigan), W. F. Barr (Univ. of Idaho), D. R. 
Davis & A. B. Gurney (Smithsonian, Washington), K. Goeden 
(Oregon Dept, of Agriculture), J. D. Lattin & D. C. Lightfoot 
(Oregon State Univ.), J. E. H. Martin (Biosystematics, Ottawa), D. 
Otte (Acad. Nat. Sciences Philadelphia), G. G. E. Scudder (Univ. of 
B.C.), Margaret Thayer (Harvard), W. J. Turner (Washington State 
Univ.), Bob Willey (Univ. of Chicago), S. M. Ulagaraj and V. R. 
Vickery (Macdonald College) and G. B. Wiggins (Royal Ontario 
Museum). We are grateful for the help of the staff of the Kananaskis 
Environmental Centre in Alberta (Univ. of Calgary). Jim Fullard, 
Darlene Morris and E. J. Morris helped with field studies. T. J. 
Walker (Univ. of Florida) and T. Alloway (Univ. of Toronto) 
transported specimens. Dr. Howard E. Evans criticized the manu- 
script. Beyond all others we acknowledge the help of Ron Aiken of 
the Univ. of Toronto. 
References 
Alexander, R. D. 
1969. Comparative animal behavior and systematics. Syst. Biol. Proc. Internat. 
Conf. Nat. Acad. Sciences, pp. 494-517. 
Alexander, G. 
1935. Orthoptera new to Colorado. Entomol. News 46: 30. 
Ander, K. 
1938. Ein abdominales Stridulationsorgan bei Cyphoderris (Prophalangopsi- 
dae) und iiber die systematische Einteilung der Ensiferen (Saltatoria). 
Opuscula Entomol. 3: 32-38. 
1939. Vergleichend-anatomische und phylogenetische Studien iiber die Ensi- 
fera (Saltatoria). Opuscula Entomol. Suppl. II, 306 pp. (Unpublished 
translation by T. H. Hubbell.) 
