You are thinking of Bajorans, I believe, Kevv. Major Kira Nerys was a Bajoran. Are these the ones you are thinking of?
![](http://www.campeones.de/3th.JPG)
Betazoids looked just like humans except that they all had black irises and they were telepathic. Deanna Troi was half-human and half-Betazoid, so she was just empathic, which means she could sense emotions in most other species of humanoids. I remember Ferengi and a couple of others were exceptions and she could not read their emotions.
![](http://www.startrek.nl/images/database/species/betazoid.jpg)