Species, country, sampling area, number of males and females, sampling code of specimen and collectors are listed.

Collectors abbreviations as follows; N. Minakawa (NM), P. Oberg (PO), D.J. Larson (DL), J. Elmberg (JE), A. Töyrä (AT), K.B. Miller (KM), W. Hilsenhoff (WH), M.K. Drotz (MD), E. Goth-Birkigt (EGB), J. Bergsten (JB) and A.N. Nilsson (AN). Samples represent either a geographical area where specimens from several local sampling sites were pooled or a single sample locality. The Nearctic C. paykulli is within this study accepted as a valid species and should be known as C. longulus LeConte. See discussion for more information.