The larva of a Rothschildia silk moth (also known as "my bow tie butterfly" from a few days ago). Their striking colors contrast with the green leaves upon which they were feeding.
a female Micrathena lucasi
a female Kapala, part of the iridicolor species complex. Like all members of the family Eucharitidae, these wasps are parasitoids of ant nests.
Chromacris speciosa, a very colorful grasshopper.