THAXTER. -MONOGRAPH OF Til 10 LABOULBEN1 A( ' K,K. 



2r>r> 



are associated on a single individual and the material examined has been so abundant that it seems hardly 

 probable that there is ever more than one type in a given individual. 



In (lie Sharp Collection a specimen of PhUtmthtU labeled "P, varum a'! Victoria, Australia," is 

 parasitized by a form closely related to the present, if not identical with it, but the specimens arc too much 

 broken to render an accurate determination possible. As far as has been definitely determined the host 

 is always umbratilis, a rather large species with dark secondaries. 



DlCHOMYCES INSIGNIS Thaxtcr. Plate XXXII, figs. 3 6. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 421. April, 1900. 



Basal cell suffused with reddish brown or partly hyaline; the lower tier wholly opaque or translucent 

 along the median line; the middle tier consisting of about thirteen to seventeen cells, exclusive of those 

 which are indistinguishable in the slender fork-like prolongations which extend on either side higher than 

 (lie middle of the upper tier, the margin broadly blackened, continuous with the opaque margin of the 

 lower tier; the lower portion of the three to five median cells marked by a few large scattered transversely 

 elongated brown patches which merge on either side into the opacity of the marginal cells; antheridia 

 very large, the venter slightly inflated, the neck sharply pointed, conical, brown, often abruptly contrast- 

 ing, three to five of the cells immediately external to them bearing normal brownish appendages: distal 

 tier very large subtriangular, distally concave, consisting of from twenty-nine to thirty-nine narrow and 

 elongated cells and bearing from four to eight peritheeia with some irregularity; the appendages brown- 

 ish, paired above the subtending cell, not as long as the peritheeia. Peritheeia relatively small, purplish 

 brown, tapering almost continuously from the broad base; the tip moderately well distinguished, the 

 posterior lips prolonged to form long nearly straight and horizontal slightly inflated appendages, which 

 project from the tip on either side; the anterior lips forming the truncate apex, which consists of two 

 distinct lateral projections with an intervening convex portion having a median apiculus. Peritheeia 

 about 85 X 30 ft, appendages from tip to tip 35-39 it. Antheridia 50 X 11 jJ~ Receptacle 300-340 X 

 200-230 (1. Total length to tip of perithecium 375-400 /i. 



On an undetermined staphylinid collected by A. R. Wallace at Sarawak, Borneo, Hope foil. Xo. 21V 

 The largest and finest species of the genus, sometimes even larger than the type represented in fig. 3. 

 The peritheeia diverge somewhat from the plane of the upper tier and thus seem in the figure somewhat 

 shorter relatively than they really are. No indication was seen in the material obtained of the occur- 

 rence of a second type of perithecium. The figure given of the anthcridium is only intended to suggest 

 its structure, the outlines of the antheridia! cells being too confused to draw with exactness. The an- 

 theridial cells appear to arise from more than one basal cell. 



Dichomyces bifidus Thaxtcr. Plate XXXII, figs. 14-16. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 26. June, 1901. 

 Basal cell slightly enlarged, pellucid, tinged with brown, about as long as broad: the lower tier, 

 and more or less of the middle tier, opaque; the marginal cells of the latter forming a bluntly rounded, 

 sometimes almost obsolete projection on either side, hardly extending above the venter of the short, stout, 

 short-necked antheridia: the upper tier relatively large, more or less crescent-shaped according to the 

 degree of lateral development, edged externally with blackish brown, more broadly below, the brown 

 area punctate; the cells about thirty-one in the larger individuals, the marginal ones forming a rather 

 slender series, which may curve abruptly upward nearly to the middle of the peritheeia, or assume a 

 more divergent habit; the perithecigerous area horizontal, producing normally four peritheeia, three 

 appendages arising between the two middle ones and one between each of the others, the external cells 

 bearing appendages as usual which vary in length. Peritheeia rather long and slender, hyaline or faintly 

 yellowish brown, conspicuously tinged with purplish brown below the perfectly hyaline tip, the anterior 

 lip-cells forming a pointed projection, the posterior ones forming each a relatively large ear-like appendage 

 which tapers to a pointed apex, and is slightly curved, the two diverging from one another at an angle of 



