hemopoietic organs
From ZooTerms (Dictionary of Invertebrate Zoology)
hemopoietic organs also hemocytopoietic organs or haemopoietic organs: (Arthropoda: Insecta) Discrete encapsulated organs, reported in Hemiptera, Coleoptera, Diptera, Lepidoptera and Hymenoptera, functioning in the formation of blood cells.
