362 MOXOGEAPH pF THE LABOULBEXIACE^. 
One mature and several immature specimens of this fine species were found on the elytra of 
a specimen of its host in the collection of the Cambridge Museum. It is at once distinguished 
by its sigmoid outline, colorless receptacle, and appressed, incurved, short appendages, as well as 
by the unusual development of its appendiculate cells. 
Rhachomyces arbusculus nov. sp. Plate TV, figs. C-7. 
Perithccium pale straw-colored, long and slender, tapering slightly and gradiiaHj towards 
the bluntly rounded apex, which is suffused with brown ; the stalk-cell short, for the most part 
hidden by the appendages. Receptacle slender^ curved or slightly sigmoid ; the cells of the main 
axis, about twenty to twenty-five in number, more or less deeply sufTused with blackish brown; 
the septa rather oblique; the apex distinct beyond the insertion of the stalk-cell of the perithc- 
cium. Appendages numerous, externally black and opaque, the inner margin more^ or less 
transparent, stiff, short, their tips more or less prominently and abru|)tly recurved, arising from 
all except the basal cell of the receptacle, and projecting oblitpioly upward ; those at the base 
of the perithccium somewhat longer and more prominently curved awny from its base on either 
side. Perithecium, 170-190 x 35-38 /a. Spores about 50 fi long (measured in the perithccium). 
Receptacle, 200-325 fi long. Appendages, 85-100 fi. 
On an undetermined staphylinid allied to Lathrohium, Mt. Coffee, Liberia, Africa (O. R 
Cook), 
This species corresponds in all respects to the type so closely' adhered to in all the other 
species of this genus, from which it mnj be readily distinguished l)y its long slender form and 
very numerous short recurved appendages. The types, which arc' in excellent condition, were 
found on the abdomen of the host, a small riparian staphylinid. 
Rhachomyces furcatus Thaxter. Plate XII, figs. 1-3. 
Proc. Am. Acad. Arts and Sci. Vol. XXX, p. 467; Acantho,n>^cesfurcatu. Thaxter 1. c. Vol. XXVITI, p. 177 
Perithecium more or less suffused with 
htly inflated at the base, 
tapermg gradually to the apex, borne on a stout and well marked ^talk-cell, liccci.laclo moro 
or less tinged w.th brownish, its main axis consisting of about twelve superposed cells, continued 
by a more slender prolongation beyond the base of the perithecium, this prolongation sometimes 
formmg a second successive main axis terminated by a second perithecium and continued by a 
simdar prolongat.on beyond the base of this second perithecium, which arises on tl,o side of 
the general ax,s nearly opposite to that which bears the Hrst. Appendages dnrl< brown, opaque, 
s^out, „g,d. nearly straight or slightly curved outward, the longest not e,,ualling the tip of the 
per.thec.um Spo,.es, 48 X 4 ^. Pe,.;theeia, 100-185 x 48-55 ^. Appen.l.cs Oon.est) about 
i '■ ^° "' "'S"' '» "P of f»<=q't"clc about 360;,. Main budv «£ receotaele about 220 m long. 
/ 
(longest) 
of tZll''\Tl"'T 1 *'"■' ^'"'^' '""^ '^cll-marked species were found on the abdomen 
of a specmen of ,ts host ,„ the collection of the Museum at Cambridge. It is characterized by 
