| Caelifera | Ensifera |
| 1. Antennae shorter than 2/3 of body length. |
1. Antennae nearly always longer than body (very short in a few burrowing species). |
| 2. Hind femur with transverse chevron-shaped ridges pointing basad. | 2. Hind femur without transverse ridges, or with ridges perpendicular, or with chevrons pointing distad. |
| 3. Tarsi three segmented (rarely two), often with pad-like arolium (may be small in some non-economically important species). | 3. Tarsi three or four segmented, without an
arolium. |
| 4. Tympana ("ears") located laterally at the base of the abdomen. | 4. Tympanum (usually) on foreleg or absent. |
| 5. Tegmina often with a thickened longitudinal (intercalary) vein which is rubbed by a file on the hind femur to produce sound. | 5. Tegmina of males modified for sound production, often with a blister-like structure near base. The right and left tegmen asymmetrical. |
| 6. Cerci not extending beyond abdomen (cercus flattened in most species of economic importance). | 6. Cerci of males extending beyond abdomen, often conical with a mesal (inner) tooth. |
| 7. Ovipositor scoop-like and short. | 7. Ovipositor either flattened and blade-like or lanceolate. |
Last updated: 01/05/07
Gerald M. Fauske
Research Specialist
NDSU
202 Hultz Hall
Fargo, ND 58105
E-Mail: Gerald.Fauske@ndsu.nodak.edu
Published by the Department of Entomology
Prospective students may schedule a visit by calling 1-800-488-NDSU.