E:first-of-type

Matches an E element, that is the first sibling of its type. (Source: W3C)

HTML:

1. <div>
2. <p>Lorem ipsum dolor sit amet, consectetur</p>
3. <div>Lorem ipsum dolor sit amet, consectetur</div>
4. <p>Lorem ipsum dolor sit amet, consectetur</p>
5. <div>Lorem ipsum dolor sit amet, consectetur</div>
6. </div>

CSS:

1. div:first-of-type{font-style:italic}

Output:

In the example, the second line of text should be set in italics as it is the first div-element in the parent element.