OF ARTS AND SCIENCES. 175 



X 4 it. Perithecia 1G0-165 x 50-70 tt. Longest appendages 105 p. 

 Total length to tip of peritheciuin 400-450 fi, longest 590 /x. 



On Philonthus cunctans Horn, Maine ; P. ?nic<<its Grav. and 

 P.debilis Grav., Massachusetts ; P. cequalis Horn, Lake Superior; 

 P. californicus Mann, California. 



The specimens on P. micans trom Sharon, Mass., found growing on 

 the upper surface of the abdomen of the host, though exactly resem- 

 bling the typical form in other respects, have the basal cell of the 

 receptacle obliquely produced to form a rounded prominence which is 

 externally deeply blackened and forms a hoof-like base. The specie- 

 is not strikingly peculiar, its appendages recalling those of L. ihjlata. 

 It approaches the luxarians type through the presence of a third 

 cell between the basal cells of its appendages, and is not to be confused 

 with either of the other species known to occur on Staphylinidae. 



Laboulbenia zanzibarina, nov. sp. 



Olive-brown except for the nearly hyaline basal cell. Perithecia 

 laro-e, more deeply colored below the somewhat suffused lips, the apex 

 prominent, straight, truncate, hardly oblique. Appendages consisting 

 of two, sometimes three, basal cells (the inner sometimes the larger), 

 longer than broad, bent with their convexity outwards, externally 

 blackened, giving rise to from one to several branches from the outer 

 surface of their upper portions ; the basal cell of each branch is also 

 curved with its convexity outwards, externally blackened, and gives 

 rise in a similar fashion to several secondary branches, the basal cells 

 of which show the same tendency to curvature and bear a series 

 of several ultimate branchlets from their distal portions, exceeding 

 the perithecium often by more than its length. Receptacle becoming 

 nearly opaque, except for the very small hyaline basal cell, stout and 

 short, cells (2) and (6) placed almost side by side. Spore, about 

 50 p long. Perithecia 100-1 10 x 3.7 p. Appendages (longest I 200 M . 

 Total length to tip oE perithecium 185-200 /x. 



On Crepidogaster bimaculata Boh., Zanzibar, occurring at the tips 

 of the elytra and the adjacent upper surface of the abdomen. 



Laboulbenia minima, nov. sp. 



Punctate, suffused with olive-brown, becoming nearly opaque, 

 except the hyaline basal cell. Perithecia becoming rounded in out. 

 line, short, the apex broad truncate, coarse-lipped, distinctly punctate 

 and nearly opaque at maturity. Appendages arising from a rounded 

 base of insertion, composed of several cells and not distinguished from 



