Identifying characteristics for the family Tettigoniidae include:
Antennae long and threadlike (cf Acrididae).
Tarsi 4-segmented.
Tympanum at base of front tibia, if present.
Ovipositor long and swordshaped.
Additional information:
References:
Page 80 and plate 2 in D. J. Borror and R. E. White. 1970.
A Field Guide to the Insects. Boston: Houghton Mifflin Co.
Page 217 in D. J. Borror, C. A. Triplehorn, and N. F. Johnson. 1989.
An Introduction to the Study of Insects, 6th ed.
Philadelphia: Saunders College Publishing. 875 p.
Page 96 in R. G. Bland and H. E. Jaques. 1978. How to Know the Insects, 3rd ed.
Debuque, Iowa: Wm. C. Brown Co. 409 p.
Page 395 in H. V. Daly, J. T. Doyen, and A. H. Purcell III. 1998. Introduction to
Insect Biology and Diversity, 2nd ed. Oxford University Press. 680 p.
Links to other web sites
Katydid List - Species in UF Natural Area Teaching Lab.