This is an OCR edition without illustrations or index. It may have numerous typos or missing text. However, purchasers can download a free scanned copy of the original rare book from the publisher's website (GeneralBooksClub.com). You can also preview excerpts of the book there. Purchasers are also entitled to a free trial membership in the General Books Club where they can select from more than a million books without charge. Original Published by: Government Printing Office in 1920 in 46 pages; Subjects: Ichneumonidae; Medical / General; Science / General; Science / Life Sciences / Zoology / Entomology;