334 



THAXTER. — ■ MONOGRAPH OF THE LABOULBENIACE.E. 



On the inferior thorax of Chlwnius biguttatus Motsch., Japan; Berlin Museum, No. 923. 

 Allied to L. kumilis, but differing in its appendages, and in the conformation of the spreading tip of 

 its perithecium which is itself differently shaped, and differently related to the insertion-cell. 



Laboulbexia humieis Thaxter. Plate LIII, fig. 10. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII [, p. 42. June, 1902. 



Rather slender, nearly uniform dirty olivaceous. Perithecia relatively large, straight, erect, the 

 outer margin nearly straight to the lips, or slightly convex; the tip not well distinguished, with darker 

 shades below the rather coarse, pale, outwardly oblique lips. Basal cell of the receptacle relatively large, 

 somewhat paler; the cells above it darker, and transversely, rather coarsely, striate-punctate especially 

 cell II; cell III separated from cell II by a short horizontal septum; cell VI separated from cells II and 

 III by oblique septa; the anterior margin of the receptacle slightly convex, the posterior strongly diver- 

 gent above cell II. Insertion-cell relatively narrow and thick, the outer appendage short, simple, taper- 

 ing, four to five-celled, slightly divergent above the basal cell, which is rather long, irregular and paler; 

 the subbasal cell separated by a more or less distinctly oblique septum, where the appendage is slightly 

 geniculate; the inner appendage erect, simple, or the small basal cell producing two pale, short, few-celled, 

 simple branches. Spores about 50 X 5 /i. Perithecia 100-125 X 30 ft. Receptacle about 185 p. Ap- 

 pendages 60-75 ft. Total length to tip of perithecium 250-275 p.. 



On the elytra of Chlcenius monogrammus Laf., Hong Kong; British Museum, No. 006. On C. 

 cyaniccps Bates, Hong Kong; Berlin Museum, No. 925. 



This species, although insignificant, is well distinguished by its feebly developed appendages, the 

 form of its perithecium and the conspicuous striation of cell II. It seems to be as nearly allied to L. Cras- 

 pidophori and L. cxigua as to any other species, but could hardly be confused with either. The form on 

 C. cyaniceps is taken as the type and illustrated in fig. 10. 



Laboulbenia Brachionychi Thaxter. Plate LIII, figs. 11-12. 

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



Perithecium wholly free, rather deeply suffused with smoky or reddish brown, subclavate or almost 

 symmetrically inflated, tapering from the middle to the nearly symmetrical, or externally slightly oblique 

 blunt tip, the basal wall-cells contracted to form a long slender neck-like subhyaline stalk. Receptacle 

 abnormally developed, cells I and II nearly equal, cells III to V forming a stalk which is deeply suffused 

 with blackish brown especially externally, and rather coarsely punctate in the darker areas, of equal diam- 

 eter throughout and quite free, except at its very base, from the rest of the receptacle : cell IV larger than 

 cell III, cell V small and separated by an oblique septum; cell II often somewhat suffused and distinctly 

 finely punctate; cell I about as long as cell II, and faintly punctate above; cell VII and the basal cells 

 of the perithecium very small. Outer appendage consisting of a basal cell deeply blackened externally, 

 and bearing a long slender simple branch, distally hyaline, more or less suffused with smoky brown to- 

 ward the base: the inner appendage consisting of a basal cell about half as long as that of the outer 

 producing a single branch on either side which may be once or twice branched, the antheridia borne 

 usually in twos or threes on short branchlets near the base. Spore 110 X 7 ft. Perithecia exclusive of 

 stalk, 270-340 X 65 p; including stalk 340-430 p.. Total length to tip of perithecium 650-800 ft; to 

 insertion-cell 400-500 p. Stalk-like portion of receptacle 138 X 38 Appendages 400-470 ft. 



On Brachionychus sp., Paris Coll. Nos. 99 and 822, Cochin China; on Episcosoma laticollis, No. 

 85, Cochin China; on Episcosoma sp., No. 86, Java. Berlin Museum No. 916 on Microxys robustus 

 Mor. Japan. Usually on inferior surface of thorax. 



This fine species appears to be quite isolated by reason of its peculiarities. Of the other species, L. 

 anomala alone possesses a receptacle somewhat similarly developed in relation to the perithecium, but 

 this aquatic form is otherwise totally diverse. The slender neck of the perithecium appears almost to 

 arise from the subbasal cell, cell VI being small and cells II-V forming together a free structure terminated 



