ilOXOGRArn OF THE LAP.OULBENIACP:.^. 290 
4 
terminal segment of tlie germinating spore, its basnl cell unly (figs. 6 and 10 i) being derived 
from the basal spore segment. The pi-ocess by which the terminal segment becomes septate 
cell 
(3-9) 
I . tlicir escape some time before the female organ has developed. The origin and development of 
the pi'ocarpe lias already been described in detail (p. 218), and furtlicr reference to it is unneces- 
sary here. 
t 
The mature peritliecium varies very considerably in tlie different species. Not only is ifs 
^. form variable, being rostrate in S. entomophilu8yC\iiya.tc in S. vircsccns, and conical in S. Bftfri; 
but the relative position of its wall-cells is not the same in citiier case. S. 
vire^fev 
able from the fact that the position usually assumed by the bsi'^al wall-cells is taken by (he basal 
cells of the perithecium, which extend up around the ascogeiiic cell and some distance above it 
(fig. 2). The perithecium of this form is moi'covcr peculiar by reason of the ai)pend<'i 
are developed from its lip-celLs. According to Karsten, two perithecia are sometimes formed in 
the same individual of S. Baeri ; but 1 have not myself seen sudi an instance, and it is undoubt- 
edly an al)normal occuri'ence. In all the species there are four cells in each of the scries of 
wall-cells, although in S. viresccns, for the reason just mentioned, there appear to be five. The 
ascogenic cells are four hi number in S. cntomophilus and .S*. liacri ; but in S. virescens there 
seems to be but one ; certainly not more than two. 
In exceptional instances, in which the female organ has not developed, the cells of the 
appendage, which would ordinarily have been converted into antbcridial cells, may grow out into 
short secondary appendages, thus, as in other similar instances, greatly increasing the numbor 
of antheridial cells. Tiiis occurs very rarely in S. Baeri, but in S. virescens does not appear to 
be uncommon. 
In S. virescens the stalk-cell of the perithecium is well developed, but in the other two it* is 
the reverse, so that the latter is nearly or quite sessile. The hosts of the genus belong to the 
Diptera and Coleoptera. 
Stigmatomyces Bafri Peyritsch. Plate VIII, fig. 9 (after Peyritsch) ; Plate I, figs. 1-26. 
Sitz. cl. WioQ. Akad. Vol. LXVIII, p. 250 (1873) ; Berlese, Maljnghia, Vol. Ill, p. .57; Winter Tilze Doutseh. Vol. II, p.'92.3, 
p. 920, fig. 2; Sorokin. Animal Para^iites, Vol. II, p. 418, Plate XXXIII, fig. 788; Lalxmlhtnut liaeri Ktioch Ass^omM. 
d. Natural, d. Rnssio a St. Pi-tersb. p. 90S (1867) ; Stigm<it<iini^r(x musar Karsten Clicmismus d. rflanzeii/.clle (18r,o), p. 
78, fig. IX ; Deutsche Flora (1880), p. 123 ; (1895) p. 119; Iledwigia, Vol. XXVII, p. 137, p. 138. fig. 3; Saccardo 
Sylloge, Vol. Vni, p. 913 ; Laboulhenia musca Pevritsch 1. c. Vol. LXIV, p. 444, I'late I ; Laboulbenia I'itrceana Soro- 
kin, Mvkologische Versuche, Charkow, 1871, p. .39, Plate IV, figs. 1-9; Bot. Zeitnng (1872), r 339- 
Perithecium brownish yellow, its lower half sub-cylindrical stout, somewhat abru]*tly 
distinguished from the suVconical terminal portion ; the tip slightly pointed and incurved, the 
cell rows spirally twisted. The appendage borne on a distinct free basal cell, curved, consisting 
of live or six obliquely superposed series of cells, the outer cell (antheridinm) of each series 
projecting free from tlie one or two cells below its base, whicli may be partly united with the 
venters of adjacent antheridia. Heceptacle consisting of a sub-cylindricnl basal and sub-basal 
cell ; the foot rather small and blackened. Total length to tip of perithecium, 230-400 fi (Pey- 
ritsch). Perithecium, 140-180 x 40-58 fi. Appendage about 85 fi. Spores, 27-30 x 4/t.. 
