C. A. Collingwood

• The Formicidae (Hymenoptera) of Fennoscandia and Denmark
• Formicidae (Insects : Hymenoptera) of Saudi Arabia (Part 2)
• Hymenoptera
• Identification and Distribution of British Ants (Hym. Formicidae). 1. a Revised Key to the Species Found in Britain
• Key to the Species of Ants (Hymenoptera, Formicidae) Found in Britain
• Survey of Iberian Formicidae (Hymenoptera)
• Synopsis of the Formicidae of North Europe
• Third Danish Expedition to Central Asia. Zoological Results 27. Formicidae (Insecta) from Afghanistan