THAXTER. MONOGRAPH OF THE LABOULBI.M \< ! K. '»3 
Laboulbenia Heli.uomoium k Thaxter. Plate LXIII, figs. 13 II. 
Am 
1«.«L» 
Perithecium straight or slightly divergent, hyaline to yellowish, 1 coming somcwhal tinged with 
smoky brown; the basal wall-cells forming a scarcely apparent short stalk; the bla ck is h tip abruptly dis- 
tinguished; the coarse translucent lip-edges outwardly oblique. Receptacle normal, hyaline tostra\ I- 
low, distally obscurely punctate and slightly suffused with faint brownish shade cells III. IV and VI 
subequal; cell V rather large, its inner margin more than one half free, nearly vertical, the thick, blad 
slightly oblique insertion-cell thus free above the base of the perithecium. Basal cell large, more or less 
suffused with brown; the two or three cells above it obliquely superposed, hyaline; all the cells leering 
distally and externally single simple branches, the basal part consisting of two cell I >c eomi ng clear brown 
constricted at the dark septa; the distal part hyaline, or more faintly brownish, distinguished by a deep 
brown suffusion at the base: the inner appendage consisting of a very small hyaline basal ell, giving 
rise on either side to a very short branch, consisting of from one to two cells; the basal one bearing an 
antheridial branch, consisting of a single rather long cell terminated by a solitary brownish antheridium 
seated like the branch on a blackened septum. Spores 70 X 7 /«. Peritb ia VM) 1 W X 35 W «. Re- 
ceptacle 220-180 [i. Appendages 185-300 ft. Total length to tip of perithecium 290 ■> ■■ 
On Ilrlluomorpha melanaria Reiche, Bga, Amazon; British Museum, No. 527. On Ptewaetm- 
thus brevicollis Dej., Surinam; Berlin Museum, No. 942. On the elytra. 
This species bears a general resemblance to small forms of both /,. triordtnata and I 1 i hogtudku 
JM'CI' 
tion from the 
fact that not only the antheridial branch, but also the antheridium it If, is distinguished by a blackened 
septum. 
norm 
ppend 
very rarely, three, branches each. 
10-11 
Proc. Am. Acad. Arts and BcL, Vol. XXXV, p. 188. Dec, 1890 
s torni 
Perithecium free, becoming olivaceous to smoky brown, mostly straight, the basal waU-celli 
ing a very short stalk, the tip rather abruptly distinguished, mostly straight, symmetrical black, distally 
hyaline. Receptacle olivaceous yellow with brown suffusions; cell I slighth nffuscd with brown, some- 
what longer than cell II, both rather narrow; the receptacle expanding rather abruptly abo^e cell ; 
cells III, IV, and V nearly equal becoming rather deeply suffused with brown. Inscrt,on-ccll broad, 
blackened. Outer appendage consisting of a large triangular basal . - II becoming deep blackish brov. ,, 
above which four to six small nearly hyaline cells obliquely superposed, or with their k>ng axes near, 
yertical, form a series which runs obliquely toward the perithecium, each cell producing erfemahy a .> ngle 
simple branch consisting normally of three cells; the basal subhyahne, much fonger (espe^b • 
U PI L branches) than 1 subbasal, which is somewhat suffuse* J"-^***^ *£ 
guished abov 
and soon disorganized : the inner appe 
terimn 
and soon disorganized: tne inner a ) h-imu^. w" 8 -^ ~ ~ . . i i i- ^i,.;,,!,. i nn(r 
usually four in number, each bearing an antheridial branch which consists of a f'f^Z b, n 
stalk-cell, seated on a blackened septum and bearing distally a pair o slightly ,, rp- h« K - 
antheridia aboul equaUing the stalk-cell in length ; their tips usuaHy exceeding those < "T**J^ 
of the outer appendage^ Perithecia 100 110 X 30 /, Total length to Up of pentbeemm 200 2S0 * 
to insertion-cell 110-125 ft; greatest width 45 ft. Appendages 6JHW «. 
On GaJeriia sp. Paris Museum No. 74, Venezuela, on the muUlytron. On a small sp - - 
With red prothorax from Guavarp.il, Ecuador, Berlin Museum, No. B6&. 
This small species, of which sufficiently abundant and pcrlcct material 
the most readily recognized members of this section, distinguished t>J «S s. 
has 
of 
of 
