FAMILY: NOSEMATIDiE 



743 



parasites, forms with two nuclei about to divide, and some multinucleate 

 forms which divide into uninucleate forms. Division may take place in 

 such a way that rows of small forms are produced. In addition to the 

 vegetative forms, the cells contain spores in clusters of eight and others 

 more irregularly arranged. The spores vary in length from 4 to 5 microns. 

 Another species, T. chcetogastris, described by Schroder (1909), is parasitic 

 in an oligochsete worm (Fig. 316). 



-Thelohania chcetogastris. Parasitic in the Oligoch.ete Worm, 

 Ghcetog aster diaphanus. (After Schroder, 1909.) 



1. Connective tissue cell containing three schizonts and spores ( x ca. 1,500). 



2. Muscle cell with reproducing forms ( X ca. 1,500). 



3-7. Stages in formation of eight spores from the single pansporoblast ( x ca. 2,500). 



Genus: Stempellia Leger and Hesse, 1910. 

 Sternpellia mutabilis Leger and Hesse, 1910. — This parasite occurs in 

 the cells of the fat body of the nymph of Ephemera vulgata. It resembles 

 very closely a Thelohania, except that the pansporoblasts give rise to 

 one, two, four, or eight spores. The latter vary in length from 2 to 6 

 microns, the largest spore being formed when the pansporoblast gives rise 

 to only one spore and the smallest when it gives rise to eight. The only 

 other member of the genus is S. magna (Kudo, 1920), parasitic in larvae 

 of Culex j)ipiens and C territans in North America. 



Genus: Duboscqia Perez, 1908. 

 Duboscqia legeri Perez, 1908. — This form is a parasite of the termite 

 Termes lucifigu.s. It gives rise to white nodules up to 500 microns in 

 diameter in the body cavity. Each nodule shows a peripheral layer of 

 multinucleate cytoplasm, within which are a number of large nuclei up 

 to 60 microns in length. The latter are probably the hypertrophied nuclei 



