The North American ichneumon-flies of the tribe Ephialtini.
Published in Proceedings of the United States National Museum, Washington D. C., in 1921, in volume 58, issue 2340, pages 327-362
Date published:1921
Published in Proceedings of the United States National Museum, Washington D. C., in 1921, in volume 58, issue 2340, pages 327-362
Date published:1921