322 



MONOGRAPH OF THE LABOULBENIACE^E. 



Laboulbenia truncata Thaxter. Plate XIII, figs. 12-14. 



Proc. Am. Acad. Arts and Sci. Vol. XXIV, p. 267. 



Dark olive brown, sometimes nearly opaque. Perithecium large, the middle third expanded 

 slightly just above the insertion of the appendages, otherwise sub-cylindrical ; the dark truncate 

 apex slightly oblique inwardly, usually as broad as the base, with large, nearly hyaline lips about 

 the pore. Appendages two : the outer straight, stout, dark brown at the base, unbranched, 

 tapering to a slender, hyaline apex : the inner short, slender, simple, hyaline, its base occupying 

 less than a third of the horizontal black disk of insertion, which is situated about opposite the 

 middle of the perithecium. Receptacle short, wedge-shaped : cell I small, triangular, its lower 

 half nearly hyaline, contrasting, its upper as dark as the basal portion of the outer appendage ; 

 the darker portions coarsely punctate. Spores, 55-60 x 4.5 /j,. Pcrithecia, 90-100 x 35-40 fi. 

 Appendages, outer, 150 /jl. Total length to tip of perithecium, 175-180 Greatest width, 66 



On Bembidium sp., New Hartford, Connecticut. 



A very small and singular species, distinguished from all others by its perithecium, which is 

 nearly as broad at its hatchet-shaped tip as at its base. It is closely allied to the preceding 

 species, but, as above stated, seems undoubtedly distinct. It has been found but once on an 

 undetermined species of Bembidium captured at the margin of a brook in shady woods. It grew 

 crowded on one of the anterior legs of its host. 



Laboulbenia Catoscopi Thaxter. Plate XVII, figs. 11-13. 



Proc. Am. Acad. Arts and Sci. Vol. XXVIII, p. 164. 



Pale amber brown, becoming suffused with olive brown at the base of the perithecium and in 

 the region of cell III. Perithecium moderate, the apex rather prominent, blackened except 

 about the pore, the blackening continued downward externally to the body of the perithecium. 

 Outer appendage single, simple, nearly straight, exceeding the perithecium ; its basal cell very 

 large, outwardly strongly inflated and blackened. Inner appendage consisting of a much smaller 

 basal cell, from which arise directly two branches, the latter two to three times successively 

 branched with small basal cells and bearing a few solitary antberidia near the base. Receptacle 

 rather elongate, normal, cell IV projecting outward beyond the rather thick black insertion 

 cell, which is situated between the two lower thirds of the perithecium. Spores, 65 X 5 \l. 

 Perithecia, 100-130 x 37 p. Appendages (longest observed), 110-130 fi. Total length to tip of 

 perithecia, 250-320 



On Catoscopus guatemalensis Bates, Mexico. On Catoscopus spp., Liberia, Africa. 



Closely resembling L. elongata in general form, from which it is at once distinguished by 

 the inflated basal cell of the simple outer appendage. More abundant material may show that 

 the measurements of the appendages given are too small. The fourteen types were obtained 

 from the abdomen of specimens in the collection of the Museum at Cambridge. Further material 

 derived from two species of Catoscopus collected by Professor Cook in Liberia is identical 

 with the Mexican form, although the basal cell of the outer appendage is not so prominently 

 inflated. 



