TIIAXTER. — MONOGRAPH OF THE LABOULHENIACEiE. 



373 



Laboulbenia CERATOPHORA Thaxter. Plate LX, figs. 32-35. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 163. Dec, 1890. 



Perithecium wholly free, borne on a short nearly hyaline stalk, slightly tinged with brown, for the 

 most part nearly straight, rather slender, hardly inflated, the outer margin usually slightly concave; layer- 

 ing slightly and rather abruptly to the peculiarly modified tip; the tip black, except externally immedi- 

 ately about the pore, a large broad tooth-like prominence projecting inward, the upper surface of which 

 is nearly horizontal; while it is continued upward and outward above and beyond the lateral pore into 

 a longer more slender, finger-like, bluntly tipped outgrowth, the lower or external margin of which may 

 be partly hyaline. Receptacle yellowish tinged with brown distally, where it is rather abruptly, but 

 slightly, broader above cell II, cell IV small and hardly longer than cell V, cells III and VI subequal. 

 Insertion-cell opposite the distal extremity of the short perithecial stalk. The basal cell of the outer 

 appendage longer and narrower than that of the inner, becoming concolorous with the insertion-cell, 

 bearing a single branch of usually three cells more or less deeply tinged with brown, each of which may 

 give rise distally on the inner side to a short simple branchlet: the inner appendage consisting of a basal 

 cell shorter and broader, which usually bears distally on either side a branch, the basal cell of which 

 usually bears distally two erect simple branchlets, one of them sometimes replaced by a single large long- 

 necked brown antheridium. Perithecia, including the stalk (17 /<), 150-155 X 30 fi. Total length to 

 tip of perithecium 290-310 //; to insertion-cell 150 fi; greatest width 35 fi. Appendages, longer 200 ft. 



On Serrimargo guttiger Schaum, Hope Collection, No. 300, Sumatra; on Miscelus Javanus King., 

 Hope Collection, No. 303, Java; on Miscelus sp., New Guinea, Paris Museum, No. 113 Type. On 

 elytra and inferior surface of the prothorax. 



A well marked species, nearly allied to L. Javana, from which it is distinguished by the conforma- 

 tion of the tip of its perithecium, as well as by other differences which appear to be constant in the ma- 

 terial examined, and are sufficiently indicated in the accompanying figures. 



Laboulbenia Assamensis Thaxter. Plate LX, figs. 36-39. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 159. Dec, 1899. 



Perithecium rather long and slender, usually straight and erect, free except at its very base, evenly 

 suffused with dark slightly reddish brown, paler distally, tapering very slightly and gradually to the not 

 abruptly differentiated tip which is somewhat rounded, slightly bent inward and suffused with blackish 

 brown; the left lateral lip-cell prolonged to form a blackish blunt-tipped prominent outgrowth, which is 

 either erect or bent slightly outward or inward. Receptacle dirty brownish yellow, punctate with fine 

 rather indistinct transverse striations, cell V very small, often hardly visible against the perithecium. 

 Appendages concolorous with the receptacle, the outer simple, straight, rigid, mostly somewhat diver- 

 gent; the inner consisting of a basal cell often as large as that of the outer, and giving rise on either 

 side distally to a branch similar to the outer appendage which bears several lateral antheridia near the 

 base. Perithecium (including outgrowth 18 /i) 185-190 X 33-37 /<. Total length to tip of perithecium 

 375-450 (L) to insertion-cell 185-300 /«; greatest width about 48 /i. Appendages, 150 p. 



On Caiascopust sp., Brit. Mus. No. 663, Assam, India. Inferior surface. 



Allied to L. tenuis, in which the appendages are very similar, and to L. Sumatra, L. Javana and 

 L. ceratopkora; although the conformation of the perithecial tip is quite different from either. The 

 material is sufficient and in good condition. 



Laboulbenia Javana Thaxter. Plate LX, figs. 17-20. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 182. Dec, 1899. 



Perithecium about two thirds or less free, sessile, tinged with brown, paler in the middle, the distal 

 portion hyaline and tapering considerably to the greatly modified tip, which is deeply suffused with black- 

 ish brown and bears two often symmetrically placed divergent outgrowths, the inner broader at the base 

 and much shorter than the outer which is finger-like, with a hyaline area above, close beside the sub- 



