371] STUDIES ON GREGARINES-WATSON 161 



Labbe regarded the species identical with Phialoides ornata, prob- 

 ably because of an identity of hosts rather than a similarity of para- 

 sites. A table of the important characteristics of the two species fol- 

 lows, and speaks for itself. 



St. brevirostris Ph. ornata 



Epimerite 1/2 length of protome- 3 x length of protomerite 



rite 

 length 1/8 length of whole spo- Equal to whole sporont 



ront without epimerite 



width 1/4 that of protomerite 1/10 that of protomerite 



shape Xipho-conical, i. e. elon- Cylindrical 



gate-conoidal, dilated in 

 middle 



apex Pointed Flattened, a thickened col- 



lar, thickly set with 20 

 (more or less) small 

 teeth 

 Protomerite 



shape Widest at shoulder, taper- Ellipsoidal 



ing to posterior end 



where widest Anterior 1/5 Central region 



Posterior extremityTapering and pointed Broadly rounded 



Nucleus 



shape Spherical, several karyo- Spherical, several karyo- 



somes somes. 



As noted above, Ellis (1912:25) changed the name of the genus 

 from Stylorhynchus to Stylocephalus, hence this name changes also. 



STYLOCEPHALUS GLADIATOR (Blanchard) Watson 



1905 Stylorhynchus gladiator Blanchard 1905:923-8 



1916 Stylocephalus gladiator Watson (This paper) 



Stylocephalus: Sporonts solitary, elongate, average length 300 to 

 400/x., maximum length 720/z, width 30/x, maximum width 70^. Protome- 

 rite short, globular. Deutomerite elongate cylindrical, with a slender 

 attenuated posterior extremity, bluntly pointed. Epimerite in two 

 parts, a very long slender cylindrical neck and a dilated xiphoid-shaped 

 apical portion, often longer than the whole gregarine. Nucleus ovoidal 

 with one large karyosome. Cysts not seen. 



Taken at Grenoble, France. Host : Helenophorus collaris L. Hab- 

 itat : Intestine. 



