Exasticolus jennyphillipsae, cocoon. A snow-white cocoon of Exasticolus jennyphillipsae was discovered in the silk and leaf pupal chamber of 08-SRNP-35960, a medium large Notodontidae caterpillar. However, without an associated adult moth, the identity of the host is unknown at present. As the cocoon ages, it turns golden brown in color, but long after the wasp has emerged through the circular hole cut by the wasp in the end of the cocoon.