406 



THAXTER. — MONOGRAPH OF THE LABOULBENIACEjE. 



Var. retusa nov. var. Plate LXIII, fig. 6. 



Perithecium short stout somewhat inflated, becoming deeply suffused with smoky brown; the tip 

 opaque, except for the translucent lip-edges and erect, or usually bent slightly outward. Receptacle 

 1 x'coining rather evenly suffused with dirty brown, paler or hyaline at the base, and sometimes with an 

 olivaceous tinge; the basal and distal portions rather variably distinguished, cells IV and V considerably 

 enlarged and elongated, carrying the insertion-cell out free from the perithecium. Appendages rather 

 closely septate, the successive cells bearing the usual series of branches externally, which are simple and 

 distinguished by a black septum at the base, the inner appendage shorter and more slender than the 

 outer, but otherwise similar. Spores about 70 X 5.5 p. Perithecium 150 X 60 p. Total length to tip 

 of perithecium 200-300 ft. Receptacle to insertion-cell 275-360 p. Appendages total length 180-280 p. 



At the base of the anterior legs and on the adjacent inferior surface of the prothorax of Brachinus 

 sp., Eustis, Fla., and from Argentina. 



This variety approaches forms of L. Pachytelis so closely that it might almost be regarded as a variety 

 of that species, and certainly would be, did it occur on the same host. The material from Eustis, which 

 is taken as the Type, differs to some extent from the Argentine specimens, which have an olivaceous caste, 

 are shorter, with a receptacle which is basally more slender and distally more conspicuously enlarged; 

 the tip of the perithecium being not as stout and less rounded and the appendages longer and niore slender 

 than in the type, which is represented in fig. 6. 



Var. tibialis Thaxter. Plate LXIII, figs. 8-9. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 205. Dec, 1899. 



Perithecium deeply suffused with blackish brown, somewhat inflated, the small tip rather abruptly 

 distinguished. Receptacle stout, deeply suffused with blackish brown except cells I and II, which are 

 hyaline or nearly so, abruptly contrasting, and cell V which together with the adjacent portions of cell IV 

 is yellowish; cells IV and V broad, the insertion-cell broad and in contact with the base of the perithecium. 

 Appendages as in L. rostellata except that the inner is larger and longer than the outer without overlapping 

 it at the base and the lower branch of the outer is simple. Perithecia 150-175 X 60-70 p. Total length 

 to tip of perithecium 300-325 p; to insertion-cell 200-225 p. Appendages exclusive of the branches, 

 inner 100-120 p, outer 85 p. 



On Brachinus sp., Eustis, Florida, October. On the legs. 



This pedicolous variety is distinguished by its contrasting coloration, the short stout form of its peri- 

 thecium and receptacle, cell IV of the latter being relatively very large, and cell II very small, about a 

 third as large as the basal cell; the two contrasting abruptly with the deep black suffusion of cell III. 

 The appendages are further unlike those of other varieties in that the outer is much smaller than the 

 inner. A second variation is represented in fig. 8, which also occurs on the legs and is distinguished by 

 its more compact form and the presence of a double hunch, which is developed externally below the tip 

 of the perithecium. Whether these differences are constant is uncertain since only two individuals have 

 been examined. 



Laboulbenia Cafii Thaxter. Plate LXIII, fig. 1-2. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 162. Dec, 1899. 

 Perithecium almost wholly free, pale amber-eolored or straw-yellow, transparent, stout, the tip blunt, 

 with blackish basal suffusions, well distinguished, especially on the inner side. Receptacle short and 

 stout, pale amber-colored, normal in form. Insertion-cell broad, often not deeply blackened. The 

 appendages consisting of an outer and an inner series of from four to six superposed cells which, through 

 a twist of the insertion-cell, become lateral instead of antero-posterior in position; each cell of these 

 scries produces externally a single simple short branch usually three-celled, the two lower cells short 

 and inflated, the upper longer tapering to a blunt apex. Perithecia 140-165 X 60-70 /(. Total length 

 to tip of perithecium 310-350 p, to insertion-cell about 170 p. Appendages, longest 85 p. 



