The Solen are a race of giant ants made intelligent by the Meer's failed Decay spell. They have recently started appearing from their underground home.
Inside their Hive in Felucca you can find the Ambitious Black Solen Queen.
The Ambitious Black Solen Queen is, as the name says, an extra ambitious individual of the Black Solen race. She desires to some day become the Matriarch of the Black Solen colony. To help her do that she will ask you to do a few favors for her.
If you choose to help her out, she will first send you to get rid of some of the competition for the position as Matriarch. This means that you will have to go kill 5 Black Solen Queens somewhere else in the Hive.
Once the Queens have been slain and you return to the Ambitious Queen, she will ask you to bring her 50 Zoogi Fungus, so she can practice transforming it into Powder of Translocation, which is an ability that only the Matriarch completely masters.
As a reward for eliminating the Queens and bringing her the Zoogi Fungus she will give you some gold, a Bag of Sending and some Powder of Translocation.