Identify the correct combinations
(a) Housefly- labellum - Dutton's membrane
(b) Moth - labellum - Dutton's membrane
(c) Butterfly - first maxillae - galea
(d) Tsetse fly - rostrum - haustellum.

Options

A. a and b
B. a and c
C. b and c
D. b and d.

Answer

To solve the question of identifying the correct combinations related to the mouthparts of different arthropods, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Option (a): Housefly - labellum - Dutton's membrane**
- The housefly has a sponging type of mouthpart.
- It consists of three main parts: the labellum, rostrum, and haustellum.
- The labellum is indeed present in houseflies and is associated with Dutton's membrane, which is located at the base of the labellum.
- **Conclusion**: This option is correct.

2. **Option (b): Moth - labellum - Dutton's membrane**
- Moths do not possess a labellum like houseflies.
- Instead, they have a proboscis that is coiled and does not include Dutton's membrane.
- **Conclusion**: This option is incorrect.

3. **Option (c): Butterfly - first maxillae - galea**
- Butterflies have a well-developed proboscis formed by the fusion of the first maxillae.
- The galea is a part of the maxillae and is indeed present in butterflies.
- **Conclusion**: This option is correct.

4. **Option (d): Tsetse fly - rostrum - haustellum**
- Tsetse flies have a different type of mouthpart that is adapted for piercing and sucking.
- They do not have a typical rostrum and haustellum like houseflies; instead, they possess a specialized structure for feeding.
- **Conclusion**: This option is incorrect.

### Final Conclusion:
The correct combinations are:
- Option (a): Housefly - labellum - Dutton's membrane (Correct)
- Option (c): Butterfly - first maxillae - galea (Correct)

Thus, the correct answers are options (a) and (c).