Descriptions of thirty-one new species of Hymenoptera.
Published in Proceedings of the United States National Museum, Washington D. C., in 1917, in volume 53, issue 2195, pages 151-176
Date published:1917
Published in Proceedings of the United States National Museum, Washington D. C., in 1917, in volume 53, issue 2195, pages 151-176
Date published:1917