A small group of Eupithecia species, of which palpata Pack, is probably the best known to eastern American workers, forms a compact entity, almost worthy of at least subgeneric designation. In all the species the palpi are very long and porrect, compressed laterally, presenting in consequence a blade-like appearance. In the male genitalia the uncus terminates in a single fine point, in contradistinction to the dorso-ventral bifid nature of this organ in the majority of Eupithecia species.