"The V.L. Kellogg Mallophaga Collection was acquired from Stanford University during the 1960s along with their holdings of Insecta of medical and veterinary importance. The collection had been in the care of G.F. Ferris at Stanford for several years and bears his mark as well. However, the bulk of this collection reflects Kellogg's years of work. It comprises approximately 4600 slide mounted specimens representing species from around the world, including primary types of at least 58 species and secondary types of many more. Many specimens have been assigned numbers which cross reference field notes and lab notes as well as notes in Prof. Kellogg's personal copy of his contribution to the Genera Insectorum series. The notes in this book also make reference to alcohol-preserved material which is not currently housed in the Essig Museum. It is possible that this material is at the University of Kansas which houses some of Kellogg's earlier collections. In addition to the Genera Insectorum chapter, some other non-specimen archives are also maintained including field and laboratory notebooks, some professional correspondence, and a few photographs and manuscripts."
Essig Museum

"Anoplura (sucking lice) - This is by far the most significant of Ferris' collections housed in the Essig Museum. It contains over 2000 slide mounted specimens with worldwide representation. These are fully identified and inventoried. Among the specimens are primary types of about 75 species and allotypes and paratypes of many more. "
Essig Museum