279] STUDIES ON GREGARINES— WATSON 69 



STENOPHORA ROBUSTA Ellis 

 [Fi^re 26] 

 1912 Stenophora rohusta Ellis 1912a :8-10 



Stenophora : Sporonts solitary, relatively short and thick. Average 

 length 153/A ; minimum length 140;u, ; maximum 180/x. Width 61 /x, as aver- 

 age. Ratio length protomerite : total length : : 1 : 8 ; with protome- 

 rite : width deutomerite : : 1 : 2.5. Protomerite small, dome-shaped 

 or conical. Slight concavity in apical portion, widest at junction with 

 deutomerite. No constriction at septum. Deutomerite broadly ellipsoi- 

 dal, widest in center, slightly rounded behind. Endocyte fairly clear in 

 all parts but especially so in protomerite. Nucleus spherical, faintly visi- 

 ble or obscured in vivo. One or more karyosomes. Cyst and spores not 

 known. 



Taken at Boulder, Colo. Hosts: Parajidus venustus Wood; Ortho- 

 morpha gracilis (Koch) ; Orthomorpha sp. Habitat: Intestine. 



STENOPHORA COCKERELLAE Ellis 

 [Figure 27] 

 1912 Stenophora cockerellae Ellis 1912 :681-5 



Stenophora : Sporonts solitary, elongate. Average length 500 to 

 SOOfi. Minimum length 186/x ; maximum 850/*. Width deutomerite not 

 given. Ratio length protomerite : : : :1 : 14.5, to 1 : 17 in adults; 

 width protomerite : width deutomerite : : 1 : 2. Protomerite more or 

 less globose, widest in posterior half. Slightly constricted at septum. 

 Peculiar in that the protomerite protrudes and retracts a short rounded 

 papilla. Deutomerite widest in anterior sixth. Posterior end broadly 

 rounded to square. Endocyte of protomerite pale gray, rather opaque, 

 nearly filling protomerite. Endocyte of deutomerite dense, lead gray to 

 almost black. Nucleus spherical, diameter two thirds the width of deu- 

 tomerite. Not visible in vivo. Cyst and spores unknown. 



Taken at Quirigua, Guatemala. Host: Orthomorpha coarctata 

 Intestine. 



