I think you have two different ants here. You need a microscope to id ants with any degree of certainty, but I think the second and third images are some species of Formica. According to http://extension.colostate.edu/topic-areas/insects/ants-in-the-home-5-518/ they are among the most common ants found in yards and gardens and are observed in homes most commonly in spring (Figure 4). They are black or reddish-brown and black ants of medium size (3/16-1/3 inch) and sometimes are mistaken for carpenter ants. They nest outdoors in loose soil and some produce mounds that incorporate twigs, dried leaves and other plant materials. Migrations into homes occur in spring when soils warm enough to cause colonies to resume activity but cool temperatures prevent normal foraging in yards. Field ants feed on a variety of foods but most often are observed visiting sweet honeydew excreted by aphids and or other sweet materials. 

The first might be a Myrmica, but I'm much less certain about this one.