OF ARTS AND SCIENCES. 43 



Perithecia 150-180 X CO-75 it. Total length to tip of perithecium 

 330-400 it: greatest width 90-100 it. Pseudoparaphyses 300 ti. 



On Platynus extenslcollis, Connecticut. 



This peculiar species occurs rarely on the inferior lateral face of 

 the thorax of its host, seldom elsewhere, and is ahundantly distinct 

 from any other species of the flagellata type. The twisting of the 

 perithecium is apparent only in mature specimens, yet this ruodifi- 

 cation seems characteristic and analogous to the more pronounced 

 distortion of the following species. 



Laboulbenia gibberosa, nov, sp. 



More or less faintly tinged with reddish brown. Perithecia 

 short, stout, expanding slightly from the base to a conspicuous 

 external hunch just below its broad, almost truncate apex. Pseudo- 

 paraphyses arising from a large outer and a very small inner basal 

 cell, simple or bearing two to three branches always above the sub- 

 basal cell, constricted at the septa, the segments becoming slightly 

 inflated, the tips usually curved and tapering: the disk of inser- 

 tion small and thick. Receptacle elongate, strongly twisted above 

 cell II., the twist continued by cells IV. and V., which are much 

 elongated, and carry the pseudoparaphyses out at right angles to 

 the axis of the perithecium. Spores 50 X 4.5 it. Pseudoparaphyses 

 180 it. Perithecia 125 X 50 it. Total length to tip of perithecium 

 500-550 M . 



On Platynus extenslcollis, Connecticut. 



A number of specimens of this rare and singular species show 

 that the twisted receptacle is a constant character, which is some- 

 times carried to such an extreme that the ordinary direction of 

 the pseudoparaphyses is reversed, the elongation and curvature of 

 cells IV. and V. bending them towards the base of the receptacle. 

 The species is large and unusually elongate, growing on the infe- 

 rior surface of its host, usually near the base of the middle pair 



of legs. 



Laboulbenta Schizogenii, nov. sp. 



Hyaline or pale yellowish. Perithecia rather short, smoky or 

 nearly opaque, especially towards the apex, the prominent rounded 

 hyaline lips of which are slightly oblique outwards. Pseudo- 

 paraphyses from two basal cells, each giving rise to two to four 

 branches, which may in turn be one to three times branched : the 

 branches all hyaline or pale yellowish, slightly curved and rounded 

 at their extremities: disk of insertion small and thick, very ob- 



