164 ILLINOIS BIOLOGICAL MONOGRAPHS [374 



This species was first described by Stein under the name Gregarina 

 acus, according to Leger, but no mention is made of the species in Stein 's 

 1848 article. Frantzius and Lankester refer the species to Stein ; Diesing 

 does not mention it. 



If the originally described species is the same as the species de- 

 scribed by Leger in 1892 under the name Ancyrophora gracilis, then 

 the name of the latter should be changed to A. acus (Stein) Leger. In 

 the absence, however, of complete data, it stands as given by Leger. 



ANCYROPHORA UNCINATA Leger 



[Figure 216] 



1892 Ancyrophora uncinata Leger 1892:147-8 



Ancyrophora : Sporonts solitary, length 150 to 200/x.. Width not 

 given. Epimerite garnished with 12 rigid hooks in two alternate rows. 



Cysts spherical. Spores spined, both polar and equatorial, 7.5 by 

 4.5/i. 



Taken at Poitiers, France. Hosts: Dytiscus sp. ; Colymhetes sp. ; 

 Sericostoma sp. ; and Limnophilus rhomhicus (L.) (Phryganea rhomb.). 

 Habitat : Intestine. 



Labbe placed Gregarina Dytiscorum Frantz. with this species under 

 the name of the latter, evidently from a similarity in the first host given 

 above. The species are, however, unlike and I have separated them, 

 listing the former among Uncertain Species, under the Actinocephalidae. 



The last three hosts given by Leger are not Coleoptera but Neurop- 

 tera and the circumstance of finding the same species of gregarine in 

 such widely separated hosts is unusual and almost unique, yet the record 

 is authentic. 



COMETOIDES CAPITATUS (Leger) Labbe 



[Figures 123, 124, 165] 



1892 Pogonites capitatus Leger 1892:150-1 



1899 Cometoides capitatus Labbe 1899 :29 



Cometoides: Sporonts solitary, elongate. Length 1500/*. Width 

 not given. Ratio length protomerite : total length : : 1 : 13 ; width 

 protomerite : width deutomerite : : 1 : 1.5. Protomerite subspherical, 

 width equal to height. Constriction at septum. Deutomerite widest at 

 shoulder, tapering from thence to a very long slender bluntly pointed 

 posterior extremity. Epimerite globose, stalked, armed with a sub- 



