According to the description, these brown ants may be flying ants, also known as mosquitoes. They usually appear in spring and summer, and their bodies are brown with tentacles and wings. Flying ants don't bite or sting. They will not pose a dangerous threat to human health.

However, flying ants may interfere with people's lives, such as gathering in rooms and affecting people's sleep. In order to solve this problem, you can try the following methods:

1. Turn off the lights: Flying ants are usually attracted by lights, and turning off the lights can reduce their number.

2. Use pesticides: Using pesticides on flying ants can greatly reduce their numbers.

3. Remove indoor food residues: Flying ants will be attracted by food residues, so removing indoor food residues can reduce their number.

4. Install a screen window: Installing a screen window can prevent flying ants from entering the room.

If these methods can't effectively control the number of flying ants, you can consider contacting a professional pest control company to get more professional advice and help.