Harvey, P. R. 1995. A review of notable bees, wasps and ants recently recorded from Essex. Essex Naturalist (London) 12:17-32.

Notes: Not seen. Cited in BIOSIS.

Harvey, P. R. 1998. The modern distribution of ants (Hymenoptera: Formicidae) in Essex with their regional rarity and threat status. Essex Naturalist (London) 15:61-111.