410 



THAXTER. 



MON GRAPH OF THE LABOULBENIACEvE. 



in position between its receptacle and perithecium, only the tip of which is free above cell V. The speci- 

 mens from the East arc usually more deeply colored, and less yellowish, cell V often less prominent than 

 in the American specimens. The appendages, though usually short or broken, as represented in my 

 Monograph, are sometimes well developed, exceeding the perithecium in length, with variably developed 

 basal cells. One form from the legs of M. Braziliensis (Berlin Museum No. 899) varies in its compara- 

 tively short stout habit, black brown suffusions, and elongate appendages (over 200 /(); but is associated 

 with the normal type, and is merely a variation brought about by growth on the legs of its host. Two 

 numbers (Paris 90 and Berlin 901) on M. orientalis from Java, vary distinctly from the type in that the 

 insertion-cell is horizontally placed, and a third of the perithecium, more or less, is free above it. In 

 these respects it is more nearly allied to L. Papuana in which more than half the perithecium is free, but 

 the apex of the latter is quite different as is the general form and coloration of the receptacle. 



Additional material has been examined from the following sources: British Museum: On ]\Iori<> 

 Georgia Pal., El Zambador, Mexico; No. 580 on M. Braziliensis Dej., Brazil; No. 579 on Morio sp., 

 Nanta, Amazon; No. 691 on Moriosomus sylvestris Motsch., Mexico. Paris Museum No. 112 on Morio 

 sp., New Guinea and No. 157 Java; No. 90, variety, on M. orientalis Dej., Java. Hope Collection; No. 

 291 on M. monilicornis Latr., Mexico; No. 293 on Morio sp., Brazil; No. 292 on M. Braziliensis Dej., 

 Brazil. Berlin Museum; Nos. 899-900 on M. Braziliensis Dej., Rio de Janeiro; No. 898 on M . simplex 

 Dej., Peru; No. 901, variety on M. orientalis Dej., Java. 



Laboulbenia Dercyli Thaxter. Plate LXVI, figs. 2-3. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 171. Dec, 1899. 



Perithecia free except at the base, short, stout, becoming tinged with brown, straight or the usually 

 very broad tip turned slightly outward, the latter black, contrasting with the hyaline lip-edges. Recepta- 

 cle elongate, faintly and uniformly tinged with smoky brown, normal, except that cell V is pushed up even 

 beyond the hyaline unmodified insertion-cell which becomes thus external to it. Appendages typically 

 consisting of an inner and an outer basal cell, the outer bearing a single oblique or nearly vertical more 

 or less irregular row of branches arising antero-posteriorly; the inner bearing a similar row on either side, 

 all the branches hyaline or yellowish brown, more or less copiously branched; the lower cells somewhat 

 inflated, the septa blackened, often oblique, the basal cells of the branches bearing distally and externally 

 from one to three obliquely superposed branchlets with blackened septa, which may branch again; the 

 ultimate branchlets tapering slightly, the septa transverse and hyaline, usually appressed and coherent. 

 A third group of branches similar to the rest sometimes arises between these and the perithecium, ap- 

 parently from the distal portion of cell V. Perithecia 140-200 X 55-60 y.. Total length to tip of peri- 

 thecium 475-875 y; to insertion-cell 400-700 y. Appendages, longest about 175 y. 



On Dercylus tenebriosus Laf. (= Eurysoma tenebrioidesl), Hope Coll. No. 328, Para; Brit. Mus. 

 No. 586, "S. America." On Dercylus ater Castel., Berlin Museum, No. 917. Para. 



This form has been found on several specimens of Dercylus always along the margin of the right 

 elytron. It is very doubtful whether it should properly be kept distinct from L. variabilis. The peri- 

 thecium is more stout and blunt, the appendages are more closely septate and flexuous, and it does not 

 show the same tendency to produce secondary appendiculate cells through proliferation of cells IV and V, 

 that is so striking in the last mentioned species. Although it may well be nothing more than a variety, 

 I have thought it best to retain the specific distinction until material can be examined in better condition 

 than that available, in which even the youngest specimens do not show the character of the antheridia. 

 That L. Dercyli is distinct from L. gibbifera on the same host where it grows in a different position, is 

 also very doubtful. 



