Which mouth part of cockroach acts as a tongue?
1. Labrum | 2. Labium |
3. Maxilla | 4. Hypopharynx |
The tegmina in Periplaneta americana are:
1. | Mesothoracic forewings not used in flight |
2. | Mesothoracic forewings used in flight |
3. | Metathoracic hindwings not used in flight |
4. | Metathoracic hindwings used in flight |