THAXTER. — MONOGRAPH OF Till: I. \B< UI.HKN I \< K. 253 
haps possible that these three 4 may be forms of one Variable .species, but although I ha\< found I). }>rin- 
cepa on a variety of hosts from various parts of the world, and in ubundan< I have n< r .seen it asso- 
ciated with D. dubius, unless it be on the above mentioned host D. vulyutm, U I bait already men- 
tioned, is also associated with a form like I), princepi which is, howevi r, usually larger iiud louter vniiIi 
a tendency to black suffusions along the margins of the first tier (Plate XXXI, fig. 9), a tendency wh h. 
though it may occur in I), dubius, is never seen in l>. princept. In the pi >en1 species the fork-like up- 
growths of the second tier are wholly absent, or rudimentary, id nev< r colored; in sinking (xmtiast 
to the normal condition in J), vulgatus. Despite these various point <»f resemblance, a careful i i \ami- 
nation of all the material has confirmed me in the opinion that the pn nt specie 1 sod probably the two 
others above referred to, should be regarded as distinct from one another. As in other ca s Peyrit- 
BchdeUo-fovms, without auricles, are very frequently ; dated with thi ies. 
Dichomtce8 htbkidus Thaxter. Plate XX XI, fi l"» M>- 
Proc. Am. Acad. Arts and Sri., Vol. XXXV, p. 428. April. I WO. 
Basal cell small hyaline with a red brown suffusion near the base: lower tier nan and elongate, 
opaque or sometimes with, a median translucent line: middle tier rather nan r, not moil (ban (i\- of 
the median cells distinguishable, and more or l< s conspiciKHuly marked 00 the anterior side by .lark 
transverse flecks or striae; distally hyaline or merely tinged with reddish brown »bo\i ' - < <»ii.ii»^r nd- 
brown and finally opaque below; the margins opaque, continuous with those of the first tier and extend- 
ing upward to form fork-like opaque projections, as in D. funifcrus, which equal or exceed the Upper 
tier in length; a single appendage arising posterior to the rather small purplish inthertdittm: upper 
tier relatively large, distally concave, composed of from fifteen to tliiriv-thi- • n irly hyaline « wit! 
reddish brown shades along the septa, the median cells sometimes fleck I with reddish brown spots or 
transverse strife toward the base, bearing two to six peritheeia which may be of two types a dated 
on the same individual or occurring on different individuals: the one type omewhal mailer, raighter 
and more erect, reddish brown, the lower half often abruptly paler or nearly hyaline, pern- rati r 
abruptly to the tip, the lips of which are auricu&te much as in D. fwdfenu; the other typ. lar, r, 
rather characteristically divergent, tapering rather abruptly to the truncate unmodified apex; ^append- 
ages hyaline, sometimes as long as or even longer than the peritb ia. Spon 35 X 4 • IVntl 
100-115 X 25-30 pu Total length to tip of perithecium 250-300 p. Receptacle 175 250 X S.> lb, ,,. 
With both types of peritheeia (the type form): on PhilotUhmi 
No. 203, Gulf of Oman, India; on Philonthus sp., British Museum, No. i 6, Sylhc. Assam. Indui 
Philonthu.s sp., Bengal, India, Berlin Museum, No. 825: P. tet«w»Shp., Japan. Sharp < oil.. No. 1 122; 
on Philonthus sp., British Museum, Xo. 368, Hong Kong, China. 
With only one form of perithecium (not appendicular): on Pkibmthus m,,rahs &» . Bntah 
i 
a ' >]>< 
Mu 
Berl 
Mu 
Paris, No. 2<i7, Punchal, Madeira; British 
roix 
lin Museum, No. 823, Europe; Berlin Museum, No. S24, North An, ma; on V Mmtku, sp British 
scum, No. 495, Balthazar. Grenada, West Indies; British M„*u,n. No* I, China; onP *n- 
... , «...,-,«■ x- tnn ^ : p n.mWfc, Kr.. Brit h Mil um. No. J07, Ceylon 
icon iv»»f ^ " —yi 
peritheeia may h< a ociatfd with, or wholly 
bee 
species of Phib 
not be consider a distinct secies. It is common on PMmM about lr„h 1'.m.l. l,u. ,»-... r ,n *. 
nor in any materia, not Asiatic have . seen the dimorphic forms The or mar,, «*i 
forks 
JNT1 
commonly characteristic A close comparison of the non-auri« ulate Asiatic type 
