366 



M0N0GKAP1? OF TUE LABOULBENIACE.E. 



On Lathrobium nitidulum Lec. and L. punctulatum Lee, Kittery Point, Maine ; on Lathrobium 

 spp. indet. Arlington, Mass., Lake Superior. 



This species seems to be a rare one, and inhabits the legs and abdomen of its host, where, 

 owino - to its small size and pale color, it is detected with difficulty. Specimens on L. nitidulum 

 are distinctly smaller than those on the second host, but otherwise there seems to be little 

 variation in the rather insufficient material examined. 



Sphalebomyces occidentalis, Thaxter. Plate XI, fig. 1. 



Proc. Am. Acad. Arts and Sci. Vol. XXX, p. 469. 



More or less evenly tinged with brownish. Perithecium large, subfusiform, with faintly 

 defined ridges at the divisions between the wall-cells, the apex made externally oblique through 

 the outgrowth of one of the lip-cells, which forms a pointed projection beyond the pore ; the stalk- 

 cell wholly free, tapering to a narrow base, and about as long as the receptacle proper. Eecep- 

 tacle small, pointed below, its sub-basal cell united throughout its length to the basal cell of the 

 appendage, its basal and sub-basal cells separated by a horizontal septum. The appendage 

 straight, rigid, tapering, composed of a series of usually four superposed cells separated by 

 oblique partitions, and bearing short branches with flask-shaped anthcridia from their upper 

 inner angles. Perithecia, 200 x 45 //.. Length to tip of perithecia, 350 p. Length to tip of 

 appendage, 200 fi. Length of receptacle, 55 /j.. 



On Pinophilus densus Lec, Utah. 



The present form was found on the abdomen of its host, and is readily distinguished from 

 S. Lathrobii by the peculiarly modified tip of its perithecium, as well as by other important 

 differences. The scanty material examined was obtained from specimens of the host (a sta- 

 phylinid beetle living under bark(?)) contained in the Le Conte collection. 



COMPSOMYCES Thaxter. Plate XL 



Proc. Am. Acad. Arts and Sci. Vol. XXIX, p. 96 ; Cantharomyces Thaxter pro parte, L c. Vol. XXIV, p. 9. 



Receptacle consisting of two superposed cells, the distal bearing from its extremity several 

 appendages and one, rarely two, stalked perithecia. Appendages sterile or fertile, simple or 

 branched, septate ; the fertile ones bearing one or more single one-celled anthcridia. sessile at 

 the extremities of the successive cells, which form the main axis of the appendage. Perithecium 

 symmetrical, conical, borne on two superposed stalk-cells, the lower of which bears one, rarely 

 two, terminal simple appendages. Asci eight-spored. Spores once-septate. Trichogyne 

 copiously branched, the receptive tips coiled in a close spiral. 



This genus, though closely related to and possibly identical with Moschomyces, has no other 

 near allies, unless it be Sphaleromyces, and its position in the series is very doubtful. With the 

 two exceptions mentioned, it differs from other genera with endogenous antherozoids in hav- 

 ing five cells in each series of perithecial wall-cells. Moschomyces also is the only other 

 instance in which the peculiar appendiculatc basal stalk-cell characteristic of this genus is found. 

 The trichogyne when well developed, as in fig. 9, is the most remarkable structure of its kind in 



