Though old, looks to be a good reference and source of illustrations of beetle larvae. Available from the Biodiversity Heritage Library:
http://www.biodiversitylibrary.org/bibliography/6818

Interesting biographical note: Frank C. (Cooper) Craighead (see also Wikispecies) was an entomologist, and his children are/were prominent in biological fields as well. His twin sons Frank C. Craighead, Jr. and John were prominent wildlife biologists. His daughter, Jean Craighead George (born 1919), is a prominent author of childrens' literature with natural history themes. (As a child, I loved My Side of the Mountain (1960), and she wrote sequels in 1990 and 1999!)