324 



THAXTER. 



MONOGRAPH OF THE L ABOULBENIACE^E. 



Sphaleromyces Indicus Thaxter. Plate LII, figs. 17-18. 



Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 41. June, 1901. 



Perithecium relatively very long and large, yellowish, very slightly inflated toward the base, tapering 

 very gradually to the broad, blunt tip which is subtended by a truncate, conical lateral projection; the 

 Stalk-cell relatively short. Receptacle relatively small, the two cells nearly equal, the upper bearing 

 the stalk-cell of the perithecium terminally and the basal cell of the appendage laterally; the latter over- 

 lapping it to its base. Appendage consisting of four superposed cells, the basal (stalk-cell) small, triangu- 

 lar; the two cells above it larger and longer, bearing short antheridial branches from the upper inner 

 angles; the terminal cell smaller, subcorneal, bearing a small terminal branehlet. Spores about 44 X 

 4 p.. Perithecium 290-340 X 45 fi, the stalk-cell 72 fi. Receptacle 55 11. The appendage 125 (i. 



On the upper surface of the tip of the abdomen of Pinophilus (near "P. rufipennis"). Malabar, 

 India. Sharp Collection, No. 1151. British Museum, Burmah India, No. 390. 



A species most nearly related to S. occidental is, which occurs on Pinophilus in Utah but is small and 

 differently shaped, and lacks the characteristic subterminal projection of the perithecium peculiar to the 

 present species. The material is, for the most part, in bad condition, the branchlets of the antheridial 

 appendages being mostly broken, but its essential characters are shown with sufficient clearness. 



Sphaleromyces atropurptjreus Thaxter. Plate LII, figs. 6-7. 

 Tree. Am. Acad. Arts and Sci., Vol. XXXV, p. 4-11. April, 1900. 



Perithecium large, purplish, more or less distinctly curved away from the appendages, tapering 

 below, often broader distally above the middle, tapering thence slightly to the tip, which is usually not 

 distinctly differentiated; the apex small truncate or slightly papillate; the basal cells large, as long as or 

 longer than the stalk-cell, dull amber-brown. Basal cell of receptacle large, not greatly elongated, taper- 

 ing below, the nearly hyaline distal portion, obliquely distinguished from the deeply suffused, partly opaque 

 portion of the cell below; the subbasal cell subtriangular. Appendage consisting of about five cells de- 

 creasing in size from below upward, the septa nearly horizontal; those above the basal cell giving rise to a 

 branch on the inner side, which in the subbasal cell and the cell above it consist of a very large broad 

 basal cell, from which arise from two to four subhyaline branches which may be once branched, the 

 branches crossing the stalk and basal cells of the perithecium obliquely, usually on the left side, so that 

 when the perithecium lies at the left, the appendages lie above them. Spores 35 X 3.5 [i. Perithecia 

 175-200 X 30-35 /£, the stalk and basal cells together 50-70 X 17-20 p.. Receptacle 85-100 X 40 (t. 

 Total length to tip of perithecium 270-350 ji. Appendage without branches 50-75 (i. 



On abdomen of Quedius graciliventris Sharp, British Museum, No. 740 (Biologia Coll.), Volcan de 

 Chiriqui, Panama; on Q. basiventris Sharp, No. 741, from same locality. 



This species is distinguished from other forms possessing a blackened basal cell, by the small unmodi- 

 fied tip of its relatively very large perithecium. It is perhaps most nearly allied to S. Brachyderi, but 

 lacks the perithecial appendage of this species. 



Sphaleromyces Brachyderi Thaxter. Plate LII, figs. 3-5. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 442. April, 1900. 



Perithecium evenly suffused with brown, paler distally, somewhat inflated at the base, tapering slightly 

 toward the tip; an external deep brown almost opaque appendage projects subterminally, exceeding the 

 tip of the perithecium, broad with a nearly median indentation of the inner side, the outer margin slightly, 

 the upper strongly curved outward, terminating in a short blunt point or slightly inflated portion rather 

 abruptly distinguished on its inner side; the tip asymmetrical, one of the outer lip-cells extending above 

 and free from the others, forming a hyaline bluntly pointed termination at the base of which the tips of 

 the other lip-cells form irregular prominences which may be slight, or obsolete; basal cells concolorous, 

 stalk-cell short and similar to the basal cells. Basal cell of the receptacle very large, long, attenuated 

 below and deeply blackened, as in Camptomyces, the distal cell subtriangular concolorous with the stalk- 



