638 PROCEEDINGS OF THE ACADEMY OF [Oct,, 



Cysts: When first obtained, 640 microns in diameter, with a cuticular 

 membrane 95 microns thick. The true cyst mass was therefore 450 

 microns in diameter, and this size was maintained. On the other 

 hand, the cuticular membrane swelled enormously and became ovoid, 

 finally reaching a length of 1150 microns and a breadth of 1000. 

 The cyst opened by simple rupture where this membrane was thinnest. 

 Sporulation was apparently total. Maturation period 9 days, August 

 14-23, 1903. 



Spores: Length 9 microns; breadth 7^ microns. Diamond-shaped 

 in longitudinal and hexagonal in transverse section. Spore wall 

 single, thick, with the cavity entirely filled with hyaline protoplasm con- 

 taining one or tAvo large to many small granules. The spores were 

 mostly adherent in files or masses, this arrangement being apparently 

 due to a thin pellicle of some gelatinous substance covering the spore 

 wall. 



This gregarine reaches a maximum length of 1200 microns. It is 

 very common, being present in considerable numbers in nearly every 

 beetle opened. On the other hand, at least from June to August, the 

 cysts are rare, the above data being obtained from a single specimen. 



Gregarina calverti Crawley. PI. XXX, fig. 15. 



Gregarina calverti Crawley (1903), p. 48, PI. 2, figs. 19-21, 

 To the original description given of this species add: 

 Cysts: Spherical, with a cuticular membrane showing concentric 

 strise. No gelatinous envelope. The young cysts show a second 

 hyaline membrane, 3-4 microns thick, within the striated membrane. 

 Cysts varying in diameter from 250 to 360 microns, the membrane 

 varying in thickness from 20-40 microns. The larger cysts do not 

 necessarily possess the thicker membranes. The cysts are probably 

 in all cases the result of a fusion of two gregarines. Dehiscence effected 

 by sporoducts, from 4-8 in number, not exceeding in length the diam- 

 eter of the cyst. Sporoducts not always all used in the projection of 

 the spores. Maturation period 4 days, August 18-22, 1903. 



Spores: Doliform, 13 microns long by 5 microns broad. A single 

 thick spore wall, which is enclosed within a gelatinous pellicle, serving 

 to hold the spores together in files. Spore contents at first wholly 

 hyaline, but rapidly differentiating into a central spherical residuum 

 and two groups of sporozoites. 

 Cnemidospora spiroboli (Crawley). PI. XXX, figs. 7-9. 



Stcnoplwra spiroboli Crawley (1903), p. 51, PI. 2, fig. 22. 

 To the descriptions originally given of this species add : 

 Cysts: Spherical, 350-500 microns in diameter, with a cuticular mem- 



