ISO ILLINOIS BIOLOGICAL MONOGRAPHS [360 



PYXINIA RUBECULA Hammerschmidt 

 [Figures 119, 159] 



1838 Pyxinia rubecula Hammerschmidt 1838:357 



1848 Actinocephalus rubecula Frantzius 1848:193, 195 



1851 Gregarina rubecula Diesing 1851:12 



1863 Gregarina rubecula Lankester 1863 :95 



1892 Pyxinia rubecula Leger 1892 :140 



1899 Pyxinia rubecula Labbe 1899 :26 



Pyxinia: Sporonts solitary, obese. Measurements not given. Ra- 

 tio protomerite : total length : : 1 : 3.6. Width protomerite : width deu- 

 tomerite : : 1 : 1.2. Protomerite large, regularly eonoidal, a little longer 

 than wide (1.2 :1), constriction at septum. Deutomerite conical, wid- 

 est at shoulder, tapering to a slender, pointed extremity. Endocyte 

 dense, of protomerite much less dense. Nucleus ellipsoidal.* Epimerite 

 situated upon a short neck, urn-shaped, wide mouthed, crenulate on the 

 periphery, with a short, stout conical style projecting upward through 

 the center. 



Cysts spherical, 250 to 280/* in diameter, spores bluntly biconical, 14 

 by 7/t. 



Taken at ?, Germany, and at Poitiers, France. Hosts: 



Dermestes lardarius L. larva and D. vulpinus Fabr. adult. 



PYXINIA CRYSTALLIGERA Frenzel 



[Figures 84, 85, 86] 

 1892 Pyxinia crystalligera Frenzel 1892 :314-29 



Pyxinia: Sporonts solitary, elongate. Maximum length 750/t. 

 Width not given. Ratio length protomerite : total length : : 1 : 5 to 1 : 

 10 ; width protomerite : width deutomerite : : 1.1 : 1. Protomerite spher- 

 ical in adults. Deutomerite of adults regularly cylindrical, tapering in 

 posterior third to a long, slender, bluntly pointed extremity. Epime- 

 rite a short sharp rigid style resting upon a small crenulate corona, the 

 whole superimposed upon the cone shaped protomerite of the cephalont. 

 Endocyte containing large, strongly refractile variously shaped crystals 

 and granules of pyxinin. Nucleus irregularly ellipsoidal, containing 

 several karyosomes. 



Cyst and spores not known. Taken at Cordoba, Argentina. Hosts : 

 Dermestes vulpinus Fabr.; Dermestes peruvianus Casteln., adults and 

 larvae of both. Habitat: Intestine. 



*Frantzius' illustration shows a spherical nucleus. 



