1. SPECIES DELIMITATION AND THE EVOLUTION OF HIGHLY VARIABLE MORPHOLOGICAL TRAITS IN THE HOLARCTIC SOCIALLY PARASITIC BUMBLEBEE, BOMBUS FLAVIDUS Open Access Author: Williams, Sarah Danielle Title: SPECIES DELIMITATION AND THE EVOLUTION OF HIGHLY VARIABLE MORPHOLOGICAL TRAITS IN THE HOLARCTIC SOCIALLY PARASITIC BUMBLEBEE, BOMBUS FLAVIDUS Area of Honors: Biology Keywords: bombus flaviduscoispecies delimitationpsithyrusbombus fernaldae File: Download Williams_Sarah_Thesis_Final.pdf Thesis Supervisors: Heather M Hines, Thesis SupervisorDr. James Harold Marden, Thesis Honors Advisor