THAXTER. — MONIMiKAI'II OK THE LABOULBENIAC EJE. 



365 



blackened area of insertion, the branches erect mostly twice subdichotomously branched, all the lower 

 septa blackened and constricted, the inner appendage .similar to the ouler: the insertion-cell unmodified 

 normally placed, broad, subhyaline, close to base of perithecium. Antheridia brown, the venter much 

 inflated, the neck becoming pointed, 23 X8/1. Perithecium 100 X 42 ft. Total length to tip of peri- 

 thecium 275 /«; to insertion-cell 175 //. Appendages 140 ft. 



On Brachinus explodens Duft., Florence Museum, Florence, Italy. 



Laboulbenia pusilla Thaxter. Piute LXV, fig. 6. 

 Proc. Am. Acad. Arts and Sci., Vol. XLI, p. 316. July, 1905. 



Short, stout, pale yellowish with brownish tinges. Perithecium free, straight, very slightly narrower 

 distally, the distal portion, except externally about the hyaline pore, deep black, the suffusion extending 

 less than half-way down externally, and about a third on the inner side: the distal end broad, flat, pro- 

 jecting on the inner side to form a rounded prominence; the pore lateral and external, hyaline, with 

 adjacent paler shades; the black, slightly projecting area below it forming a more or less clean-cut line 

 of demarcation. The receptacle short and stout; cells I and II subequal, as are also cells III and IV. 

 Appendages as in L. oriental is, hyaline, the two basal cells partly overlapping and bearing each four to 

 five branches four to five times branched, the cells distinguished by constrictions and blackish septa. 

 Spores 45 X 5 ft. Perithecia 90 X 36-40 ft. Receptacle 100-110 ft. Total length to tip of perithe- 

 cium 200 X 210 ft. Appendages 100-110 ft. 



On inferior surface of Brachinus scotomedes Redt, Japan; Berlin Museum, No. 994. 



This very peculiar little form is most nearly related to L. orientalis of which it may possibly prove 

 to be an abnormal condition. It is however quite unlike the smaller forms of this species which grow- 

 in similar situations, and the types show no tendency to vary toward the normal form, even very young 

 perithecia exhibiting the very peculiar conformation represented in fig. 6. 



Laboulbenia Japonica Thaxter. Plate LXV, fig. 7. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 44. June, 1902. 



Short and stout, unevenly suffused with smoky or faintly olive brown. Perithecium relatively very 

 large and long, more or less distinctly curved toward the appendages; the base subhyaline, the body 

 evenly dark, slightly olivaceous brown, scarcely inflated, tapering very slightly to the stout, evenly 

 rounded, opaque, hardly differentiated tip; the longitudinal series of wall-cells slightly spiral, describing 

 about one quarter of a turn or somewhat more. Receptacle relatively small, short and stout, the basal 

 and subbasal cells hyaline, contrasting, the latter somewhat larger, separated by an oblique partition 

 from cell III, which is small, subtriangular and deeply suffused; cell IV larger, suffused, as is cell V, 

 which is relatively large and long-oval; cell VI deeply suffused, extending down beside and to the base 

 of cell II; the cells above it also suffused and more or less indistinguishable. Insertion-cell large and 

 unmodified. Basal cells of the outer and inner appendages vertically elongated, each bearing externally 

 and distally a series of four or five superposed branches distinguished by blackened septa, curved out- 

 ward and often downward, and branching in a radial plain, the branches two to four times branched, 

 forming a compact tuft, the basal cells usually bearing three branchlets, the further division of which 

 is subdichotomous; the cells not differing very greatly in size, except the terminal ones, which are some- 

 what elongated hyaline subisodiametric and blunt-tipped. Spores 80 X 5 ft. Perithecia 235 X 70 ji. 

 Receptacle 185 X 70 fx. Appendages 100-150 ft. Total length to tip of perithecium, average, 420 ft. 



On anterior legs of Brachinus sp., Japan; Sharp Collection, No. 1188. 



This is a striking species allied to L. orientalis and more closely to L. rhinophora, which has the 

 same peculiarly developed receptacle in which cell VI extends downward to cell I, although it lacks the 

 monstrous development of cells IV and V peculiar to this species. The perithecium is also quite different 

 and unlike any forms of L. orientalis, both in form and relative size. The appendages project out sub- 

 horizontally in a compact mass, with a tendency to recurve, and the branching is in a plane coincident 



