MONOGRAPH OF THE LABOULUENTACE^E. 



323 



Laboulbenia umbonata Thaxtcr. Plate XV, figs. 9-12. 



Proc. Am. Acad. Arts and Sci. Vol. XXVIII, p. 163. 



Perithccium becoming faintly, sometimes deeply, suffused with brown, projecting free from 

 the receptacle at an angle of about 60°, the outer margin curved inward strongly to the blackish 

 tip, the prominent car-like lips of which are strongly incurved ; a clearly defined rounded promi- 

 nence on the inner side below the apex. Outer appendage hyaline, or with brown shades, con- 

 sisting of a large, stout, cylindrical basal portion nearly equalling the receptacle in diameter and 

 length, made up of a basal and somewhat shorter sub-basal cell, from the distal end of which 

 arise two (rarely three) straight, very long and slender, tapering branches. Inner appendage 

 arising from a very small triangular basal cell, its external wall directly continued by that of the 

 outer appendage by which its upper surface is covered, its lower half cutting off obliquely a 

 small portion of the large black insertion cell ; its upper half producing sub-laterally a single 

 short appendage, consisting of a single cell, bearing at its apex two rather long antheridia. 

 Receptacle characterized by a stalk-like, slightly inflated base, made up of cells I and II, which 

 are very large, the cells of the distal portion, except cells IV and V, very greatly reduced, so 

 that the perithccium appears to rise almost directly from cell II. Cells IV and V elongated, 

 carrying the broad constricted insertion cell upward, free from the perithecium ; the axis of the 

 receptacle coincident with that of the outer appendage. Spores, 60 x 5 fi. Perithecia, 110 x 

 59 /ti (including the hump which projects about 7 n). Appendages (longest), 925 p. Receptacle, 

 155-185 x 18-33 ft. 



On Stenolophus ochropezus Say, Kittery Point, Maine, and Cambridge, Mass. 



This remarkable form is one of the most clearly distinguished members of the genus, and 

 cannot possibly be confused with any other known species. In old specimens the perithecium, 

 especially its hump-like projection, may become almost black, but the fruiting plant is at first 

 nearly hyaline. The lip-cells of the perithecium are not symmetrical on either side, the inner 

 cell on the right side terminating in a rounded, ear-like tip, that on the left side being longer and 

 narrower. The trichogyne is simple or sparingly branched, slender, and in one specimen spirally 

 coiled toward its tip. The species has been found only on the inferior lateral face of the pro- 

 thorax of its host on the right side. The beetle is common under stones about ponds, but the 

 fungus seems decidedly rare. 



Laboulbenia lepida nov. sp. Plate XIV, figs. 7-10. 



Perithecium projecting at an angle to the axis of the receptacle and appendages, hyaline, 

 becoming more or less deeply tinged with smoky brown ; the apex blackened, the suffusion 

 extending lower externally ; rather evenly inflated, the tip bent strongly outward, the lip-cells 

 prominent, hyaline-tipped, compressed around the pore. Outer appendage consisting of a large 

 basal cell bearing two branches, their basal cells about equal, symmetrically placed and produc- 

 ing each two branchlets, symmetrically divergent, long, slender, somewhat flexuous, hardly 

 tapering and simple. The inner appendage consists of a very small basal cell, from which arise 

 one, usually two, branches, slender, short, once or twice branched, bearing a small number of 



