THAXTER. — MONOGRAPH OF TH E3 LABOULBENIACE E. 



37 I 



suffused with olive brown, (lie latter prominent below the black insertion-cell; cell III slightly longer than 

 cell VI which lies erect beside it. The outer appendage consisting of a somewhat incurved scries of aboul 

 three obliquely superposed cells, the basal large, externally suffused with olive-brown, the rest successively 

 smaller, yellowish, all bearing distally a branch from a nearly horizontal base, the branches mostly once or 

 more branched and more or less deeply suffused; the inner appendage consisting of a basal cell somewhat 

 smaller than that of the outer, which bears on either side a branch somewhat similar to the outer append- 

 age: the whole forming a dense tuft of branches mostly opaque or deeply suffused with olivaceous brown, 

 and strongly curved toward, or partly across, the peritheeium. Perithecium 1(15 X 50 fi. Appendagi 

 longest 125 fi. Receptacle 360 X GO /l Total length 500 p. 



At the base of the posterior legs of Lebia sp., Java, Rouyer, No. 1398. 



A smaller form, which cannot be separated from this species, occurs on the legs of the host (fig. I), 

 and differs in the blunt straight tip of its perithecium, the absence of dark suffusions, except in the append- 

 ages and at the tip of the perithecium, in its ill developed appendages, and in the greater prominence of 

 the cells about the base of the perithecium. The latter character is one which distinguishes this species 

 from any other known to me,, and the type form represented in fig. 3, can hardly be confused with any 

 other. It appears to be somewhat allied to L. insiynis, but not at all closely. 



Laboulbenia Australiensis Thaxter. 

 Additional material of this species on Acrogenys hirsuta from Australia has been obtained from the 

 British Museum No. 668 and from the Berlin Museum No. 943. The branches of the appendages appear 

 to be very brittle, and in most of the adults are so broken that their true character is obscured. The vari- 

 able basal cell of the outer appendage, unlike those of the specimens figured in my Monograph, is apt to be 

 more or less completely and deeply suffused, and in general gives rise to an outer and an inner branch ; the 

 inner hyaline and usually furcate above its basal cell; the successive cells of the main axis of the outer, 

 about three in number, more or less deeply suffused, especially externally, each giving rise distally, some- 

 times from both the inner and outer angles, to rigid branchlets, which may be simple or, especially in the 

 lowest, commonly bear several secondary branchlets which grow upward. This type of branching seen 

 in the outer appendage is unusual, and the species is well distinguished. 



Laboulbenia prominens Thaxter. Plate LIX, fig. 14. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 195. Dec, 1899. 



Perithecium short and stout, less than half free from the receptacle, nearly opaque blackish brown 

 lighter distally, the short broad blunt black tip rather abruptly distinguished on the inner side. Recep- 

 tacle rather stout, cells I and II dirty yellowish or subhyaline, the rest more or less deeply suffused with 

 blackish brown ; all the cells except cell I marked by fine transverse striations more distinct on the suffused 

 portions; cells III and IV large and prominent, the insertion-cell broad but narrower than cells IV-V. 

 Outer appendage consisting of a short irregular cell abruptly prominent externally above the insertion-cell, 

 narrowed distally and bearing two branches antero-posteriorly, the outer externally deep blackish brown, 

 once branched, its outer branchlet blackened and also branched, the inner consisting of a short basal cell 

 which bears an inner and an outer branchlet, all the branchlets pale brown, except the outermost which 

 is blackened, curved outward: the inner appendage consisting of a basal cell smaller than that of the 

 outer, irregular and bearing a branch on either side; each once branched, the branchlets like those of 

 the outer appendage. Perithecia 150 X 52 //. Total length to tip of peritheeium 310-330 /*; to insertion- 

 cell 275 ;i. Greatest width 95-100 //. Spores 75 X 7 \i. 



On PericaUm guttatus Chev., Brit. Mus. No. 571, Java. On legs. 



A stout species, the form of which is similar in general to that of L. Maylayensis the distal part of the 

 receptacle (cells III-V) being as large as the whole remainder. The appendages are, however, quite dif- 

 ferent, as is the form and position of the perithecium. But two specimens of the species have been exam- 

 ined, in both of which the tips of the ultimate branchlets of the appendages are broken. 



