THAXTER. NEW LABOULBENIACE^B. 435 



Rhachomyces Philonthinus nov. sp. 



Peritheeia borne on a short broad hardly visible stalk-cell, reddish 

 brown, inflated toward the base, couical above, straight and nearly sym- 

 metrical, the tip blunt, undifferentiated symmetrical. Main axis of the 

 receptacle distinct, consisting of about twenty cells, including about eight 

 to ten cells which form its erect free termination beside the base of the 

 perithecium ; the three lower cells mostly suffused with red brown, those 

 above hyaline or partly suffused, increasing in size to about the eleventh 

 cell, above which they become successively smaller to the tip of the free 

 portion ; the septa for the most part marked by rather prominent con- 

 strictions. Appendages numerous but not obscuring the main axis of 

 the receptacle, slightly divergent, mostly tapering distally and slightly 

 bent below the straight hyaline tips ; those arising about the base of the 

 perithecium longer and stouter, brown and mostly blunt tipped, about 

 six in number and extending about to the middle of the perithecium. 

 Spores about 40-45 X 4/x. Peritheeia 140-200 X 40-GO^. Receptacle 

 220-340 fx. Total length to tip of perithecium 350-500 p. Longest 

 appendages about 100 /x. 



On Philonthus longicornis Steph., British Museum, No. 408, Island 

 of St. Helena; on Philonthus sp. indet., Hope Coll., No. 225, British 

 Isles. On abdomen and elytra. 



Rhachomyces velatus nov. sp. 



Perithecium short stout straight symmetrical, evenly inflated pale 

 brownish, translucent ; the tip abruptly dark brown opaque or nearly so, 

 tapering symmetrically to the blunt rounded apex. Receptacle varying 

 in length, consisting of perhaps eighteen to twenty cells, the basal cell 

 and sometimes two or three of those above it hyaline or nearly so, the 

 rest indistinguishable, being concealed by the densely crowded appressed 

 appendages, which are rather short and slender, deep brown or opaque 

 except along the inner margin and at the tip ; those around the base of 

 the perithecium also densely crowded, subequal blunt-tipped, wholly suf- 

 fused, completely enveloping it and wholly concealing it till it is fully 

 developed when the tip alone projects beyond them. Spores about 35- 

 40 X 3-4 ft. Peritheeia 175 X 75 fi or smaller. Total length to tip of 

 perithecium 400-550 p. The longer appendages about 120 ft. 



On Colpodes agilis Chaud., British Museum (Biologia Coll.), No. 096, 

 Jalapa, Mexico; on C. atratus Chaud., British Museum (Biologia Coll.), 



