OP ARTS AND SCIENCES. 41 



X 55 p. Pseudoparaphyses 55 p. Total length to tip of perithe- 

 ciuin 200-225 p : greatest breadth 50-55 p. 



On Bembidium bimaculatum, Washington (Miss Parker). 



This species occurs usually upon the posterior legs of its host, 

 and is peculiar for the great number of spores which it produces in 

 its unusually large inflated perithecia, the pseudoparaphyses being 

 almost obsolete in mature specimens. 



Laboulbenia parvula, nov. sp. 



More or less suffused with dark olive-brown. Perithecia slightly 

 inflated, darker at the base and apex, the latter expanded slightly, 

 rather large, the coarse lips oblique inwardly or nearly horizontal. 

 Pseudoparaphyses exceeding the tip of the perithecium, arising 

 primarily from two basal cells, above which from six to eight ulti- 

 mate branches are formed, the outer larger, straight, divergent, 

 nearly opaque at its base ; the rest straight, nearly hyaline : disk 

 of insertion black, just above the base of the perithecium in posi- 

 tion, and producing a constriction at the apex of the receptacle. 

 Receptacle short, cells III.-VII. becoming nearly opaque, cell II. 

 less deeply colored, cell I. nearly hyaline, or suffused only on the 

 outer side. Spores 35-40 X 4 p. Perithecia 100 X 40 p. Total 

 length to tip of perithecium 165-180 p : greatest width 44-50 p. 



On Platynus extensicollis, Virginia (Pergande). On Bembidium 

 bimacidatum, Washington (Miss Parker). 



A small species, without striking peculiarities, yet easily sepa- 

 rated from any form known to me, and apparently constant in its 

 characters, as shown by a comparison of material from two such 

 widely separated localities as those above mentioned. 



Laboulbenia inflata, nov. sp. 



Hyaline or slightly tinged with brownish. Perithecia rather 

 small, straight, the tip bent outwards, a black patch below the 

 rather coarse hyaline lips. Pseudoparaphyses two to four in num- 

 ber, peculiar from the inflation of the first two or three basal cells, 

 above which they are rigid, thick-walled, curved slightly outwards, 

 hyaline, tapering to a blunt apex; the basal cell of the outer 

 pseudoparaphysis is much larger than the rest, short, flat, and 

 much inflated. Receptacle normal, the cell walls unusually thick. 

 Pseudoparaphyses 120 p. Perithecia 85 X 30 p. Total length to 

 tip of perithecium 190 p. 



On Bembidium sp., S. Dakota (Aldrich). 



