1. Alternative reproductive strategies in wasps: queen, worker, or both?

   • M. H. Richards

   Highlight Article 01 July 2019 Pages: 333 - 334

2. To leave or to stay: direct fitness through natural nest foundation in a primitively eusocial wasp

   • A. Brahma
   • S. Mandal
   • R. Gadagkar

   Research Article 24 April 2019 Pages: 335 - 342

   

3. Ants in isolation: obstacles to testing worker responses to task stimuli outside of the colony context

   • N. Leitner
   • C. Lynch
   • A. Dornhaus

   Research Article 07 March 2019 Pages: 343 - 354

   

4. The effect of ground surface rugosity on ant running speed is species-specific rather than size dependent

   • M. E. Grevé
   • S. Bláha
   • H. Feldhaar

   Research Article 07 March 2019 Pages: 355 - 364

   

5. Hybridization in the European carpenter ants Camponotus herculeanus and C. ligniperda (Hymenoptera: Formicidae)

   • B. Seifert

   Research Article 12 March 2019 Pages: 365 - 374

   

6. Natural history and ecology of fungus-farming ants: a field study in Atlantic rainforest

   • M. U. V. Ronque
   • R. M. Feitosa
   • P. S. Oliveira

   Research Article 22 March 2019 Pages: 375 - 387

   

7. Population structure and sociogenetic organisation in a species with ergatoid queens, the desert ant Ocymyrmex robustior

   • N. Lecocq de Pletincx
   • A. Kuhn
   • S. Aron

   Research Article 08 April 2019 Pages: 389 - 401

   

8. Wood excavation, construction, and architecture in two Reticulitermes subterranean termites

   • L. Berville
   • E. Darrouzet

   Research Article 20 April 2019 Pages: 403 - 411

   

9. Population genetic structure of native Iranian population of Apis mellifera meda based on intergenic region and COX2 gene of mtDNA

   • M. Modaber
   • J. Nazemi Rafie
   • H. Rajabi-Maham

   Research Article 24 April 2019 Pages: 413 - 424

   

10. Alates of the termite Reticulitermes flaviceps feed independently during their 5-month residency in the natal colony

    • Z. Khan
    • M. Zhang
    • L. X. Xing

    Research Article 17 May 2019 Pages: 425 - 433

    

11. Acromyrmex fowleri: a new inquiline social parasite species of leaf-cutting ants from South America, with a discussion of social parasite biogeography in the Neotropical region

    • C. Rabeling
    • S. Messer
    • J. H. C. Delabie

    Research Article 17 May 2019 Pages: 435 - 451

    

12. Larvae promote a decline in the harvesting of myrmecochorous seeds by Myrmica rubra ants

    • A. Bologna
    • C. Detrain

    Research Article 22 May 2019 Pages: 453 - 461

    

13. Quantitative variations of Constrictotermes cyphergaster (Isoptera) instars over time in a Neotropical semiarid ecosystem

    • E. F. Lucena
    • A. Vasconcellos
    • F. M. S. Moura

    Research Article 22 May 2019 Pages: 463 - 470

    

14. Unique nest entrance structure of Partamona helleri stingless bees leads to remarkable ‘crash-landing’ behaviour

    • K. Shackleton
    • N. J. Balfour
    • F. L. W. Ratnieks

    Research Article Open access 31 May 2019 Pages: 471 - 477

    

15. Queen–worker aggression in the facultatively eusocial bee Megalopta genalis

    • A. R. Smith
    • M. Simons
    • M. A. Seid

    Research Article 19 June 2019 Pages: 479 - 490

    

16. Behavioural response of workers to repeated intergroup encounters in the harvester ant Messor barbarus

    • G. Birch
    • M. A. Cant
    • F. J. Thompson

    Research Article Open access 19 June 2019 Pages: 491 - 500

    

17. In memoriam Jacques Gervet (1934–2018)

    • G. Theraulaz
    • V. Fourcassié
    • M. Pratte

    In Memoriam 22 May 2019 Pages: 501 - 502

    

18. Correction to: Intraspecific variation in colony founding behavior and social organization in the honey ant Myrmecocystus mendax

    • T. H. Eriksson
    • B. Hölldobler
    • J. Gadau

    Correction Open access 17 April 2019 Pages: 503 - 503