Published in Transactions of The Royal Entomological Society of London, in 1921, in volume 68, pages 305-326

Published in Transactions of The Royal Entomological Society of London, in 1921, in volume 68, pages 327-330

Published in Transactions of The Royal Entomological Society of London, in 1921, in volume 68, pages 331-339

Published in Transactions of The Royal Entomological Society of London, in 1921, in volume 68, pages 347-413

Published in Transactions of The Royal Entomological Society of London, in 1921, in volume 68, pages 414-416

Published in Transactions of The Royal Entomological Society of London, in 1921, in volume 68, pages 417-418

Published in Transactions of The Royal Entomological Society of London, in 1921, in volume 69, pages 145-190

Published in Transactions of The Royal Entomological Society of London, in 1921, in volume 69, pages 231-233

Published in Transactions of The Royal Entomological Society of London, in 1921, in volume 69, pages 234-259

Published in Transactions of The Royal Entomological Society of London, in 1921, in volume 69, pages 260-267

Published in Transactions of The Royal Entomological Society of London, in 1921, in volume 69, pages 268-283

Published in Trans. R. Ent. Soc. Lond, in 1921, in volume 1921, pages 196-230

Published in Transactions of the Entomological Society of London, in 1921, in volume 1921, pages 504-516