172 ILLINOIS BIOLOGICAL MONOGRAPHS [382 



similar to Tenebrio molitor. It is quite possible that the parasite is not 

 identical with or a variety of the classic G. cuneata, for the figure does not 

 exactly coincide with the others, but no data whatever accompanies the 

 figures and it seems best to leave the species in the present position. 



GREGARINA POLYMORPHA (Hammerschmidt) Stein 

 [Figures 140, 141, 142, 153] 



1838 Clepsidrina polymorpha Hammerschmidt 1838 :357 ? 



1848 Oregarina polymorpha Stein 1848:210,222 



1848 Gregarina polymorpha Frantzius 1848:193,195 



1851 Gregarina polymorpha Diesing 1851 :13 



1875 Clepsidrina polymorpha Schneider 1875 :580 



1899 Gregarina polymorpha Labbe 1899 :10 



1902 Gregarina polymorpha Berndt 1902:404-8 



1904 Gregarina polymorpha Leger and Duboscq 1904 :354-7 



1910 Clepsidrina polymorpha Pfeiffer 1910 :108 



1911 Gregarina polymorpha Ishii 1911 :279 



Gregarina: Sporonts biassociative, elongate, cylindrical, maximum 

 length 350/x, maximum width 100/*. Ratio length protomerite : total 

 length :: 1 : 5 to 1 : 7; width protomerite : width deutomerite :: 1 

 : 1.8 to 1 : 2. Protomerite dome shaped, as wide as high, no constric- 

 tion at septum. Deutomerite elongate cylindrical, rounded at posterior 

 extremity. Nucleus small, spherical, one karyosome. 



Cyst and spores unknown. 



Taken at Berlin, Germany, and Roscoff and Grenoble, France. Host : 

 Tenebrio molitor L. larva and adult. Habitat: Intestine. 



Hammerschmidt knew two of the forms of gregarines parasitic in 

 the larvae of Tenebrio molitor. He called them, however, by one name. 

 In the words of Stein, 



"Hammerschmidt kannte wahrscheinlich bereits zwei dieser Formen, ; 

 er hielt sie aber fur eine Art und nannte sie Clepsidrina polymorpha." 



Stein differentiated the two species, calling one G. cuneata, my fig- 

 ure 133, the other G. polymorpha, my figure 142. 



Frantzius gave, side by side, figures of Stein's G. cuneata and G. 

 polymorpha, and called them both G. polymorpha. (PI. VII, group V, 

 Figs. 1 and 2; my figures 135 and 140). 



Lankester mentioned G. polymorpha and under this name gave as 

 synonyms Stylorhynchus ovalis Stein and G. cuneata Stein. 



Schneider brought together again in coincidence with Hammer- 



