Ichneumon-flies of America North of Mexico pt. 2: Subfamilies Ephialtinae, Xoridinae, and Acaenitinae
- 1 January 1960
- journal article
- Published by Smithsonian Institution in Bulletin of the United States National Museum
- No. 216,p. 1-676
- https://doi.org/10.5479/si.03629236.216.1-2