Submitted to: Proceedings of the Entomological Society of Washington
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 24, 2002
Publication Date: N/A
Interpretive Summary: The subfamily Phycitinae is the largest group of the moth family Pyralidae with an estimated 4000 species and is well known for its many stored product pests. The classification of three related genera is clarified and 2 species new to science are described from Costa Rica. Identification keys are provided for the species so that they can be readily identified by yquarantine personnel. This information will be useful to both action agency identifiers and to pest managers and other scientists.
The genera Megarthria Ragonot, Drescoma Dyar, and Lascelina Heinrich are redescribed. Amegarthria Neunzig & Dow and Megacerdessa Neunzig are newly synonymized with Megarthria and Lascelina, respectively. One species of Megarthria, two species of Drescoma, and three species of Lascelina are recognized in Costa Rica. Two of the Lascelina species are described as new: Lascelina papillina and Lascelina pitilla. Megacerdresa cordobensis Neunzig is given the new combination Lascelina cordobensis (Neunzig). One new specific synonymy is proposed: Megarthria cervicalis Dyar is placed as a junior synonym of Megarthria peterseni (Zeller). Keys are provided for species of males of Drescoma and Lascelina. Habitus photographs of male adults, and line drawings of most male antennae, and male genitalia of all species are included. Also figured are the female genitalia of four of the six species, and the forewing and hindwing of Drescoma cyrdipsa, and the costa of the forewing of Megarthria peterseni.