Housefly have sponging mouth parts while mosquito has piercing-sucking mouth parts.

Answer

### Step-by-Step Solution

1. **Identify the Mouthparts of Housefly**:
- Houseflies have sponging mouthparts.
- The mouthparts consist of the epipharynx, maxilla, labium, and hypopharynx.
- Notably, houseflies lack mandibles, which are typically used for biting and chewing.

2. **Understand the Function of Housefly Mouthparts**:
- The absence of mandibles means that houseflies cannot bite or chew food.
- Instead, they have adapted to sponge up liquids, which is why they are classified as having sponging mouthparts.

3. **Identify the Mouthparts of Mosquito**:
- Mosquitoes possess piercing-sucking mouthparts.
- Their mouthparts include elongated maxillae that form a needle-like structure.

4. **Understand the Function of Mosquito Mouthparts**:
- The elongated maxillae allow mosquitoes to pierce the skin of their hosts.
- Once they pierce the skin, they can suck blood, which is why they are classified as having piercing-sucking mouthparts.

5. **Evaluate the Original Statement**:
- The statement claims that houseflies have sponging mouthparts and mosquitoes have piercing-sucking mouthparts.
- Both descriptions are accurate based on the anatomical and functional characteristics of each insect.

6. **Conclusion**:
- Therefore, the statement is true. Both the characteristics of housefly and mosquito mouthparts are correctly defined.