Abstract:
Two new species oftineid moths discovered riding on the backs of
two species of spiny pocket mice (Heteromyidae) in Costa Rica are described.
Amydda sell'ae. new species, was found on Heleromys desmarestianus Gray in
the rainforest at Finca La Selva and Plilopsaflis sa"tarosae. new species, occurred
on Liomys salvi,,; (Thomas) in the dry forest at Santa Rosa National Park. Only
female moths were observed and collected. Biological observations on both moths
and their hosts in phoresy are summarized.