Genus Tutelina: Dendryphantines characterized by unusual chelicerae with a very stout fang and a keel along the medial margin. Typically uniform colored, from gray or green to black, though T. harti is often mottled. Some species have a prominent V-shaped tuft of black hairs above anterior eye row.

Some species, especially T. formicaria, are reasonably antlike. Probably all specialize on eating ants. I rarely encounter any other jumping spiders that show any interest in attacking ants. I suppose there's not much meat there, and there is the possibility the ant under attack  unleashes a pheromone storm that attracts more of their type, bent on destruction in defense of a nestmate.

1. Bugguide.net, Tutelina
2. Jumping Spider Vision David Edwin Hill, via Creative Commons Attribution 3.0