THAXTER. — 



MONOGRAPH OF TIIK LAROULBENIACK/K. 



400 



blackened on the inner side, where it may form a hunch-like projection, .sometimes wholly black, the 

 inner lips often prominently rounded and terminal, sometimes subtended externally by a more or less well 

 developed hunch. Receptacle concolorous with the perithel ium, marked by faint transverse striatums, 

 long and slender; cell II usually greatly elongated; the distal portion small and normal, protruding more 

 or less distinctly below the perithecium. Outer appendage consisting of a small basal cell more or less 

 rounded and producing distally from two to four branches, usually four; an outer and an inner, the two 

 others placed between them one on either side, the branches simple or usually not more than once branched 

 above the basal cell; the branchlets slender, often flexed, rather closely septate, hardly tapering: the 

 inner appendage consisting of a smaller rounded basal cell which produces on cither side a single branch, 

 which may branch several times and bears hyaline lateral or terminal anthcridia singly or in pairs; all 

 the branches nearly hyaline. Perithecia 130-190 X 30-40 Total length to tip of perithecium 400- 

 700 [i, average 500 ft, to insertion-cell 275-450 ft. Appendages, longest 350-400 ft. Greatest width 

 40-50 fi. Spores 35-45 X 4-4.5 fi. 



On Polyliirma sp., Paris Museum, Nos. 5, 6, and 168, Tangar, Algeria. Berlin Mus. No. 1051 on 

 P. hamifera Harold, Zanzibar. Sharp Coll. No. 1167 on Polyhirma sp., Lorenzo Marques, Africa. 

 On inferior surface of abdomen and thorax, especially in depressions at base of posterior legs. 



This species is subject to considerable variations the extremes of which are illustrated in figs. 1—3, 

 the latter being the normal type-form from which the original description was drawn. This normal 

 form, although it is not distinguished by any very striking peculiarities, does not seem nearly related to 

 any of the known species. The normal arrangement of the branches of its outer appendages is unusual, 

 cell IV is relatively small, not longer than cell V in general; the rest of the receptacle slender, the peri- 

 thecium relatively small, as are the spores. Between this normal type and the variety represented in 

 fig. 2, a complete series of intermediate conditions occurs. The variety represented in fig. 1, in which 

 the general form is stouter and more compact, with a relatively larger perithecium, having a tip quite 

 differently shaped, was found in company with the type and is certainly not to be separated from it. Its 

 spores are larger (45 X 4.5 /i), however, than in the type, in which they hardly exceed 35 ft in length. 



Laboulbenia Papuana Thaxter. Plate LXI, fig. 1. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 193. Dec, 1899. 



Perithecium nearly two thirds free, straight or curved slightly outward, the inner margin convex, 

 pale brownish yellow, the tip rather well differentiated, blackish; the hyaline irregularly prominent lip- 

 edges turned inward. Receptacle elongate, cell II, and cell I except at its base, conspicuously tinged 

 with blackish and faintly transversely striate-punctate, the rest of the receptacle concolorous with the 

 perithecium; cell IV externally concave, the whole receptacle more or less prominently bent anteriorly 

 in the region of cells III and VI. Insertion-cell broad, horizontal, black, narrower than cells IV— V. 

 The basal cells of the appendages simple and distinct, the outer producing a single branch which may 

 branch once; the branchlets short; the basal cell of the inner appendage producing two small branches 

 which may be once branched. Spores about 65 X 5.5 ft. Perithecium 160-200 X 55-65 ft. Total 

 length to tip of perithecium 650-880 fi; to insertion-cell 544-700 fi. Appendages, longest seen, 140 ft. 



On Mario sp., Paris Museum, No. 112, New Guinea. On anterior inferior surface of thorax on 

 right side. 



It is conceivable that this species might prove an extreme form of L. Morion is which occurs on the 

 same host; but its horizontal insertion-cell, the peculiar modification of the apex of its perithecium, and 

 the form and coloration of its receptacle, seem to distinguish it sufficiently. 



Laboulbenia Morionis Thaxter. 

 Although this species appears to be subject to considerable variation in form, size, color, and in the 

 development of its appendages, it is, with the exception of a possible variety on Morio orientahs from 

 Java below referred to, readily separable from the other species of the "Clivinoe" group, by the relation 



