226 PROCEEDINGS OF THE ACADEMY OF [May, 



microns long, the youthfulness of which was plainly indicated by their 

 transparency, and fully half had lost their epimerites. 



Host. — Dissosteira Carolina (L.). 



Locality. — ^Wyncote, Pennsylvania. 



Stephanophora pachyderma sp. n. (PI. XVIII, figs. 2, 3.) 



Grcgarina locustoe-carolinoe Leidy (1853), p. 239, pi. 11, figs. 37, 38. 

 Gregarina locustoe-carolinoe Leidy (1856), p. 47. 

 Gregarina fimbriata Diessing (1859), p. 730. 

 Gregarina locustoe-carolinoe Labbe (1899), p. 35. 

 Stephanophora locustce-carolinoe Crawley (1903), p. 54. 



Epimerite. — Consists of a cylindrical piece, bearing in front a number 

 of forwardly directed digitiform processes. Separated from the proto-- 

 merite by a mere constriction, no definitive neck being formed. 



Protomerite. — In the cephalonts, consisting of a cylindrical basal 

 portion, narrowing regularly in front to the base of the epimerite. 

 This anterior conical part, which makes up one-half the length of the 

 protomerite, is composed entirely of ectosarc. In the sporonts, 

 almost perfectly hemispherical, with its contour continuous with that 

 of the deutomerite. 



Deutomerite. — In the cephalonts, lanceolate, with a blunt posterior 

 end. Broader than the protomerite, and broadest just behind the 

 septum. There is scarcely a constriction between the two. In the 

 sporonts, heart-shaped. 



. Epicyte. — ^Thickness 2-3 microns. The thickness is essentially 

 uniform over the entire gregarine, except for a small region at the 

 anterior tip of the protomerite. Here the epicyte thickens on its inner 

 surface, making a small indentation into the sarcocyte. 



Sarcocyte. — Always very thick. In the cephalonts, making up one- 

 half the length of the protomerite. On account of the change of shape 

 which follows decapitation, the sarcocyte is more conspicuous in the 

 protomerite of the cephalonts than in that of the sporonts. Yet even 

 in the latter, it here measures 30 microns, which is reduced to 12 

 microns elsewhere. 



Entocyte. — In the sporonts, black in transmitted light in the deuto- 

 merite. Not quite so dense in the protomerite, and here showing a 

 relatively clear space, as indicated in fig. 3. 



Nucleus.— ¥ airly large, with a number of karyosomes. 



Size. — The largest sporont seen was 500 microns long. 



Host. — Dissosteira Carolina (L.). 



Locality. — Wyncote, Pennsylvania. 



The perfectly oval shape of this last species, sometimes disguised 

 by their habit of holding the long axis bent, is probably normal. Yet 

 one balloon-shaped specimen was seen. 



