400 



THAXTER. MONOGRAPH OF THE LABOULBENIACE^E. 



slightly outward, or straight, rather blunt; the lip-edges translucent, the lip-cells rather prominent, black- 

 ened below, especially on the inner side. Receptaele short coarsely punctate, triangular, cell I short, 

 slender, curved, hyaline at the base, distally becoming suffused and finally indistinguishable from cell II, 

 which is finally wholly opaque. Cells III and IV elongated and lying obliquely side by side, cell III form- 

 ing a more or less prominent rounded projection below the apex of cell IV which also forms a slight exter- 

 nal prominence just below the insertion-cell, both cells coarsely punctate, becoming opaque; cell V rather 

 large, at first hyaline, becoming later suffused with brown; cell VI and the other cells below the peri- 

 thecial neck coarsely punctate transluscent. Insertion-cell black, very broad, often becoming indis- 

 tinguishable from the basal cells of the appendage. .Outer appendage consisting of a subtriangular basal 

 cell distally rounded, becoming deeply suffused with blackish brown, prominent externally and coarsely 

 punctate; surmounted by a series of obliquely superposed cells close set, their long (transverse) axes some- 

 times almost perpendicular, each bearing externally a single simple branch, the two lower cells of which 

 are longer than broad, tinged with brown, the septa dark and often oblique; the distal portion hyaline, 

 twice as long, blunt-tipped: the inner appendage consisting of a smaller basal cell also becoming punctate 

 and almost entirely suffused, surmounted on either side by a series of cells like that of the outer appendage 

 and similarly branched, except that the two or three lowest cells of the series bear a short one-celled branch 

 terminated by usually three slightly curved brown antheridia. Spores 52 X 4 /<. Perithecia 110 X 22- 

 150 X 33 p, exclusive of neck which is 20-30 p. Total length to tip of perithecium 175-300 p; to insertion- 

 cell about 90-110 p.; greatest width 40-55 p. Appendages 90-130 p. 



On Trichognathns sp., Paris Museum, No. 72, Venezuela. On Galerita sp., U. S. Nat. Museum 

 No. 23, Bobo, Mexico. On Galerita sp. Berlin Museum No. 961, Mexico. 



This species, which occurs on the legs, elytra, and other parts of the host, is distinguished by its short 

 stout habit and densely black punctate perithecium, which is similar to that of L. Galerita in this respect. 

 The specimens from Bobo are slightly more slender than the type material from Venezuela (Paris No. 

 72), the receptacle, above the basal cell, less triangular and less deeply suffused, but otherwise exactly 

 similar. It is most nearly related to L. media, but is well distinguished by its smaller size, and especially 

 by the different structure of the receptacle and basal portion of the appendages in the latter, and their rela- 

 tion to the insertion-cell. 



Laboulbenia media Thaxter. Plate LXII, figs. 3-4. 

 Proc. Am. Acad. Arts and ScL, Vol. XXXVIII, p. 45. June, 1002. 

 Perithecium usually narrow, straight, erect, sometimes slightly inflated, the basal wall-cells forming 

 a relatively long, well-distinguished, hyaline or subhyalinc stalk; the basal cells vertically elongated; the 

 ascigerous portion marked by distinct transverse blackish coarse granular striations throughout, and 

 becoming opaque or nearly so; the tip erect, the apex slightly asymmetrical, subtended by a darker shade 

 on the inner side. Receptacle medium to short, the basal cell hyaline, becoming dirty brownish yellow; 

 cells III and IV deep brownish, the suffusion more or less confined to these cells or involving also cell II 

 and other adjacent cells, the more deeply suffused parts coarsely punctate; cell III extending upward 

 beside cell IV and distally forming a well-defined external prominence, sometimes as distinct as that 

 formed by the basal cell of the outer appendage; cells V and VI wholly or partly hyaline becoming dirty 

 brownish yellow, the latter coarsely punctate. Insertion-cell small, almost wholly external to cell V, 

 hardly distinguishable, translucent and only finally involved in the opacity of the adjacent cells. The 

 basal cell of the outer appendage large, subtriangular, forming distally and externally a rounded promi- 

 nence, from the upper nearly horizontal surface of which arises the first of the oblique series of branches; 

 the remaining cells of the appendage hyaline, very obliquely superposed successively smaller, from about 

 six to ten in number, forming a series extending obliquely back to the perithecium, each bearing externally 

 a single branch; the branches relatively short, the basal cell more elongated than the subbasal, both pur- 

 plish brown, slightly constricted at the dark septa; the rest of the branch shorter or not much longer than 



