Blatta orientalis can be distinguished from Periplaneta americana in that the female of Blatta is with

Options

A. With large eyes
B. With large wings
C. With smaller wings
D. With vestigeal wings

Answer

To distinguish Blatta orientalis from Periplaneta americana, we need to focus on the characteristics of the female of Blatta orientalis. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Identify the Species**:
- We are comparing two species of cockroaches: Blatta orientalis and Periplaneta americana.

2. **Physical Characteristics of Blatta orientalis**:
- Blatta orientalis, also known as the Oriental cockroach, is typically 20 to 30 millimeters long and has a blackish color.

3. **Wings of Blatta orientalis**:
- The female Blatta orientalis has vestigial wings, which means her wings are underdeveloped and not functional for flight. In contrast, the male has short wings.

4. **Physical Characteristics of Periplaneta americana**:
- Periplaneta americana, known as the American cockroach, is larger, measuring about 30 to 50 millimeters long and is also capable of flight.

5. **Wings of Periplaneta americana**:
- Both male and female Periplaneta americana have fully developed wings that are functional, allowing them to fly.

6. **Conclusion**:
- The key distinguishing feature is that the female of Blatta orientalis has vestigial wings, while the female of Periplaneta americana has fully developed wings.

### Final Answer:
The female of Blatta orientalis can be distinguished from Periplaneta americana in that the female of Blatta orientalis has vestigial wings.

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