My specimens ship dried and unmounted, each in its own envelope with the collection data printed on it. That means the insect has been preserved but not pinned yet, so you get to mount it yourself the way your assignment requires.
Because they’re dry, they’re brittle. Don’t try to pin them straight out of the envelope or the legs and wings will snap. First relax them (see the relaxing chamber topic in Collecting and Pinning Tips), then pin and label.
Keep the envelope! The printed data (location, date, collector) is exactly what you need to make your labels.
Questions about handling specimens? Ask below.