317] STUDIES ON GREGARINES— WATSON 107 



dilated again less extremely below. Widest part twice the width of 

 narrowest part. Protomerite equal in length to its greatest width, a 

 slight constriction at septum, Deutomerite widening out rapidly from 

 septum to shoulder, and quite regularly cylindrical from thence down- 

 ward. Very broadly rounded at distal end. Nucleus spherical, small. 

 Endocyte not dense. 



Cysts spherical, llOjx in maximum diameter, one spore duct only, 

 spores barrel shaped, 5 by 2.75ju, in dimensions. 



Taken at Wyncote, Pa. Host: Gryllus ahhreviatus Serv. Habitat: 

 Intestine. 



Ellis placed the species in question in the genus Gigaductus, origi- 

 nally created by Crawley himself for Gigaductus parvus. I have al- 

 lowed this genus to drop out, removing the type species to the genus 

 Gregarina, for its differentiating character was the large single spore 

 duct. A discussion of the matter is found in the chapter on Coleoptera, 

 under the species Gregarina parva. 



This species has been replaced in the genus to which it was origi- 

 nally assigned. 



GREGARINA LONGIDUCTA Ellis 



[Figure 195] 



1913 Gregarina longiducta Ellis 1913c :78-82 



Gregarina: Sporouts biassociative, obese. Length of associations 

 800 to 900/A. Ratio length protomerite : total length primite : : 1 : 3.5 ; 

 width protomerite : width deutomerite : : 1 : 1. Protomerite broadly 

 rounded in front, widest through middle, twice as wide as high, and 

 deeply constricted at septum. Deutomerite slightly broader than high, 

 barrel shaped, widest through middle. Very broadly rounded or flat- 

 tened at posterior end. Satellite longer than primite in all associations 

 observed. Nucleus not seen. Endocyte very dense, black. Epimerite 

 a short digitiform process equal in length to protomerite of cephalont. 



Cysts spherical, 560/x in average diameter. Spore ducts 3 to 3.5 

 mm. in length, four in number, arranged around one pole of cyst. 

 Spores discharged in chains. Cylindrical, 3 by 6.5/x,. 



Taken at Douglas Lake, Mich. Hosts: Ceuthophilus latens Scud- 

 der and C. maculatus (Say). Habitat: Intestine. 



