Hymenoptera – Symphyta. Categories: Out of print handbooks, Publications Biological recording & species identification Hymenoptera RES Handbooks for the Identification of British Insects Volume 6, Part 2a R. B. Benson 1951 - 58 pages Description Description DownloadDownload Hymenoptera – Symphyta. RES Handbooks for the Identification of British Insects, Volume 6, Part 2a Important information about shipping delivery times and goods exported from the UK