44 B. GRASSI AND A. SANDIAS. 



Kent and Leidy in their well-known works^ I have employed 

 the following names for the seven species studied. 



Fam. Lophomonadidse. 



I. Joenia annectens, gen. et. sp., Grassi (inCalotermes 

 flavicoUis). 



II. Trichonympha agilis, Leidy (in Termes luci- 

 fugus). 



III. Microjoenia hexamitoides, gen. et sp., Grassi, = 

 immature Trichonympha of Leidy (in Termes lucifugus). 



Fam. Cercomonadidae. 



IV. Monocercomonas termitis, Grassi (in both Calo- 

 termes flavicollis and Termes lucifugus). 



V. Dinenympha gracilis, Leidy (emend.) ; probably = 

 Pyrsonympha vertens, Leidy (pro parte) (in Termes 

 lucifugus). 



Fam. Pyrsonymphidse. 



VI. Pyrsonympha flagellata, Grassi (in Termes 

 lucifugus). 



VII. Holomastigotes elongatum, gen. et sp., Grassi 

 (in Termes lucifugus). 



I. 



JoENiA ANNECTENS, gcu. et sp., Grassi.^ (PI. 20, figs. 6 — 9.) 

 Atti Ace. Lincei (5), p. 36 (1892) .^ 



Of relatively gigantic size, usually exceeding 130 ju in 

 length and 40 /z in width. Variable in shape, sometimes 

 pyriform with the broad end anterior, sometimes constricted 

 in the middle with the anterior extremity the smaller. 



Like Lophomonas, it has a large tuft of numerous fla- 

 gella at the anterior extremity, is devoid of cytostome or 



1 The genus Joenia is dedicated by me to the memory of the distinguished 

 naturalist Cavaliere Gioeni. 



' [Although the genera and species described by Professor Grassi are 

 indicated as new in the original of the present memoir, the descriptions were 

 actually published in the preceding year.] 



