title: An inexpensive device for increasing the usefulness of the comparison eyepiece in examining slide-mounted ectoparasitic insects.
mesh_terms: D000818:Animals; D003365:Costs and Cost Analysis; D005260:Female; D006652:Histological Techniques; D008297:Male; D008853:Microscopy / Q000295:instrumentation*; D008003:Phthiraptera / Q000166:cytology*; D005423:Siphonaptera / Q000033:anatomy & histology*