1018 PHOCEEDINGS OF THE THIED ENTOMOLOGICAL MEETING 



By these characteristics the family Pyrsonymphidse seems similar 

 to that of Holomastigidse of Franca : but I think that the family 

 Pyrsonymphidse must subsist with the following addition : axial fila- 

 ment, single or multiple. 



Eeally, when we study the two species of PyrsonympJia described 

 before me, we will see that in P. -yertewsLeidy describes " in addition 

 to the undulatory lines of the surface of the body or the ciliary invest- 

 ment, another accessory to movement usually seen more or less 



distinctly as a cord, narrow fold or doubly contoured line extending 

 from one end to the other." On Plate 170, figure 79, 1 have reproduced 

 the P. vertens of Porter, a figure extracted from Ra}' Lankester's Treatise 

 on Zoology. This figure shows a " gpeciahsed (muscular ?) band running 

 through the whole length of the medulla." This apparatus I consider 

 to be an axostyle. 



In P. fiageUata you see easily the axostyle apparatus, under the 

 form of a curved cone, with the base turned to the inferior pole. 

 ^My P. grassii has all the characteristics of a Leidya but possesses an 

 axostyle, whose disposition is quite contrary to that of P. flageUata 

 and ending apjjarently near the nucleus to which the base of the axostyle 

 seems to form a kind of cradle. 



But in the family Pyrsonymphidse, Grassi included his genus Holo- 

 mastigotes, which seems to me a doubtful genus and in every respect 

 must belong to the family Holomastigidse ; you will soon see the figures 

 of H. elongatum of Grassi, a parasite of the Italian Leucotermes lucifiigus. 



In Plate 169, figures 51-56, are seen the figures of different positions 

 of a new Infusorian for which I was obliged to create a new genus. I 

 have gladly associated with it the name of Franca. Figure 51 represents 

 the dorsal view, figures 52 and 53 the side views with the right lip very 

 developed. Figure 54 shows the parasite seen with its mouth in a 

 moment of dilatation, fig\ire 55 the ventral face, and figure 56 the view 

 from the inferior pole. The micronucleus is situated inside the mega- 

 nucleus, the endoplasm is full of particles of wood and minute vacuoles. 

 There is no anus. All the cilia are of the same length, excepting those 

 of the mouth, which are longer. The striation of the body is helicoidal 

 and the centre of this striation seems to be the nuclear region. I have 

 named this parasite Fmnciella termitis and it belongs to the order of 

 Heterotricha, suborder Polytricha, group Bursarina. The genus most 

 closely alUed to it is the genus Bursaria, whose typical species is B. 

 truncatella of Fr. Muller. 



Plate 170, figures 57-60, show the Trichonymphids of Coptotermes 

 travians from Ceylon, briefly described by Professor Bugnion. You 

 will see that numbers 57 and 58 are Leidya metclmihowi, number 60 



