THAXTER. NEW LABOULBENIACE^. 423 



Philonthus umbratilis Grav., British Museum, No. 362, Leicester, Eng- 

 land ; Paris Museum No. 206 and British Museum, No. 407, Madeira; 

 Paris Museum, No. 175, St. Pierre et Miquelon. 



Dichomyces hybridus, nov. sp. 



Basal cell small hyaline with a red brown suffusion near the base: 

 lower tier narrow and elongate, opaque or sometimes with a median trans- 

 lucent line : middle tier rather narrow, not more than five of the median 

 cells distinguishable, and more or less conspicuously marked on the ante- 

 rior side by dark transverse flecks or striae ; distally hyaline or merely 

 tinged with reddish brown above, becoming red-brown and finally opaque 

 below; the margins opaque, continuous with those of the first tier and 

 extending upward to form fork-like opaque projections, as in D.furciferus, 

 which equal or exceed the upper tier in length ; a single appendage aris- 

 ing posterior to the rather small purplish antheridium : upper tier rela- 

 tively large, distally concave, composed of from fifteen to thirty-three 

 nearly hyaline cells with reddish brown shades along the septa, the median 

 cells sometimes flecked with reddish brown spots or transverse stride 

 towards the base, bearing two to six perithecia which may be of two types 

 associated on the same individual or occurring on different individuals : 

 the one type somewhat smaller, straighter and more erect, reddish brown, 

 the lower half often abruptly paler or nearly hyaline, tapering rather 

 abruptly to the tip, the lips of which are modified much as in P. furci- 

 ferus ; the other type larger, rather characteristically divergent, tapering 

 rather abruptly to the truncate unmodified apex ; appendages hyaline, 

 sometimes as long as or even longer than the perithecia. Spores 35 X 

 4 fi. Perithecia 100-115 X 25-30^. Total length to tip of perithecium 

 250-300 t x. Receptacle 175-250 X 85-145//,. 



With both types of perithecia : on Philonthus aeneipennis Boh., Paris 

 Museum, No. 203, Gulf of Oman, India; on Philonthus sp., British Mu- 

 seum, No. 366, Sylhet, Assam, India; on Philonthus sp., British Museum, 

 No. 368, Hong Kong, China. 



With only one form of perithecium (not appendiculate) : on Philonthus 

 ventralis Grav., British Museum, Ealing, England ; Paris, No. 207, 

 Funchal, Madeira; British Museum, No. 426, Europe; on Philonthus sp. 

 British Museum, No. 495, Balthazar, Grenada, West Indies; British 

 Museum, No. 369, China ; on P. proximus Woll., British Museum, No. 

 403, Canaries; on P. gemellus Kr., British Museum, No. 367, Ceylon ; 

 on Philonthus sp., Niagara Falls, N. Y. (C. Bullard). 



