While throwing darts, jane scored two bull's-
s-eye shots in a row. her partner, joe said, "way to go catniss! "
item being alluded to:
purpose for the allusion:

Remember that an allusion is a reference to a person, place, thing, or idea. These references must cointain certain cultural significance, that will allow the audience to understand it. For example, if an author makes an allusion to a personal experience without a previous mention or explanation, the audience won't undestand him/her at all.

Here Joe refers to Jane's good aim, he calls her Catniss making reference to "The Hunger Games" main character. Remember that she is an excellent bow shooter. As you can see he is using a character that is well know by young people, comparing her aiming skills with his friend.  

because he is using a description to provide evidence to support his argument.

hope this could