366 iiONOGPvArn of the laboulbexiace.e. 
On Lathrolium mtidulum Lcc. and L. pundulatum Lcc, Kittcry Point, Maine ; on Lathrohium 
spp. indct. Arlington, Mass., Lake Superior. 
This species seems to be a rare one, and inliabits the legs and abdomen of its host, where, 
owing to its small size and pale color, it is detected with difficulty. Specimens on L. nitklulum 
are distinctly smaller than those on the second host, but otherwise there seems to 
variation in the rather insufficient material examined. 
be 
Sphaleromyces occidentalis, Thaxter. Plato XI, fig. 1. 
Proc. Am. Acad. x\rts aud Sci. VoL XXX, p. 4G9. 
More or less evenly tinged with browuish. Perithecium large, snbfusiform, 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. Hecep- 
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 Bcptuiu. 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 anthrridia from their upjjcr 
inner angles. Perithecia, 200 x 45 /i. Length to tip of pcrithecia, 350 ^. Length to tip of 
appendage, 200 /tt. Length of receptacle, 55 ^. 
On Pinophilus densus Lee, Utah. 
The present form was found on the abdomen of its host, and is readily distinguished from 
*S'. Latlrolii 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- 
phyliuid beetle living under bark(?)) contained in the Le Conte collection. 
COMPSOMYCES Thaxter. Plate XL 
rroc. Am. Acad. Arts and Sci. Vol. XXIX, p. 96 ; Canthamnyces Thaxter pro parte. 1. c. Vol. XXIV, p. 9. 
Receptacle consisting of two superposed cells, the distal bearing from its cxtremitv several 
appendages and one, rarely two, stalked perithecia. Appendages sterile or fertile, simple or 
branched, septate ; tlie fertile ones bearing one or more single one-celled antheridia. 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 whicli bears one, rarely 
two, terminal simple appendages. Asci eight-spored. Spores once-septate. Trichogyne 
copiously branched, the receptive tips coiled in a close spiral 
Tins genus though closely related to and possibly identical with Moschomyccs, lias no other 
near alhes unless ,t be Sphaleromyces, and its position in the series is very doubtful. With the 
JO excep^ons mentioned, it differs from other genera with endogonon. antherozoids in hav- 
:^f::"l":,r' !":"^'P^^:^^^!^^^^ -"-"- Mosehomyces also is the only other 
ppendiculatc 
Ihe tr.ol,ogy„c ^I.cn well developed, as in fi;;, 9, i. the most remarkable strueturo of its kind in 
