Udea pyranthes is a moth of the family Crambidae. It is endemic to the Hawaiian islands of Kauai, Oahu, Molokai, Maui and Hawaii.
The larvae feed on Vactinium calycinum, Vactinium penduliflorum and Vactinium penduliflorum gemmaceum. The caterpillar has a pale brown head checkered with darker brown.
. Elwood Zimmerman . 1958 . Insects of Hawaii . 8 Lepidoptera: Pyraloidea . University of Hawaii Press. 10125/7337 .