A Revision of Cresson Pate (Hymenoptera, Apoidea, Bembicidae) with the description of two new species

Abstract

I describe two new species of the previously monotypic, Chilean endemic nysonine genus Cresson: C. mariastea Packer, sp. nov. and C. salitrera Packer, sp. nov., redescribe the type species C. parvispinosus (Reed) and provide an identification key for the three species. I clear up the confusion associated with the original type material of the latter species by designating a specimen from the type locality as the lectotype. The new species extend the range of the genus northwards, one by over 1000 km. I suggest putative hosts for all three species, all of which are in the genera Tachysphex or Parapiagetia.