Some of the information in my other post is outdated, so this is what's changed:
Many bugs aren't available at this time. To my knowledge, here they are: dragonflies, fireflies, spiders, emperor butterflies, ringlet butterflies, monarch butterflies, blue morpho butterflies, small blue butterflies, and green hairstreak butterflies.
Some of the available bugs have had their rarities changed. Mantises have become less common, while ladybugs have become increasingly more common. The currently available butterflies have become more common.
Many prices have changed. Mantises have increased to 52 gralats. Fireflies are now 34 gralats. Ladybugs have dropped down to 37 gralats. Emperor butterflies are only worth 20 gralats. Monarch and ringlet butterflies are 34 gralats. Karner butterflies have jumped to 51 gralats, and small blue butterflies to 52 gralats. Clouded yellow butterflies are 53 gralats. Tiger butterflies are 69 gralats, peacock butterflies are 70 gralats, and green hairstreak butterflies have gone up to 84 gralats.
And now there is an entirely new bug...
Bee: Uncommon. It is found by throwing bushes and killing pyrats. When the bee first comes out, it flashes red twice, then starts to chase the person that found it. Run up until the bee is coming up at you in a straight line. Then swing your bug net a little before it gets within your bug net's range. If the bee stings you, it will die and you will lose .5 HP. Hitting a bee that is chasing someone else will redirect it to chase you. 87 gralats.