MOyOGluril OF THE LAJ^0UL]?EXIACr.15. 3(i3 
the conspicuous prolongatiou of its rcccptacl*^ beyond ihc. base of Ibo pcritLeciunij whicli gives 
it a more or lc;:>s furcate habit TIic pcntliccinm is large and its stalk-eell more lii^bl}* devel- 
.0])ed than that of any other speciofl. 
KriACUUMYCLs Latjiuobii Thaxter. Plate X, ilp:^. 22-2^. 
Proc. Am. Acad. Arts aud Sci. Vol. -XXX, p. 4C7 ; Acauthvm^ ^ - A -' Vi" 'J^Imxtcr 1 c. Vol. XX\'I11, p. 17«. 
Pcrithccium becoming slightly BufTuscd with brown, its blunt conical tip dai*k brown, con- 
A 
trasting; ratlicr slender, slightly inflated towards the base, borne on a short .stalk-coll more or 
less concealed. Receptacle consisting usually of eight to ten superposed cells, formIn,2: the main 
axis and deeply suCfused with blackish brown except at the nearly hyaline septa. Appcndniros 
large, curved, almost opa^pio, nearly equalling, often greatly exceeding, the tip of the I'onthccium- 
Sporcs about 50 x4^. Perithecia, lOO-lGO x 35-40 ft. Appendages (longer), 150-450 /x. lic- 
coptaclc (average), 110 /x long. 
On abdomen of Lathrohium lottjiu^culum Grav., New IJampshirc and Lake Superior; 
Lnlhrohium sp., Pennsylvania. 
Tlic appendages of the sj)ccinien3 from Niw TTamiishirc are constantly far Inngor than tluisc 
of the Lake Superior specimens, resembling A, pUosellufi in this rosin^ct. The two forms seem 
otherwise identical, and are distinguished from A. piloseJIus by th^^ cliaraetcrisfionlly hrown-tippcd 
pcrithccium, longer receptacle, and more densely crowded appendages. 'J'he infested hosts WTre 
all found in the collection of the Museum at Cambridge. 
Rhachomyces PiLOSELLrs Thaxter. Piute XH, fins. 12-15. 
rroc. Am. Acad. Arts and Sci. Vol. XXX, p. 467; Lal^nlh^nm pih ",( TJnMn, Traitc du Mirr rr»po, p. 912, fig. 2S5 (1871); 
Acanthomyces hrevtj^es Tliaxter, Proc. Am. Acad. Arts ami Sci. Vol. XXVllI, p. J 77. 
Perithecium suffused with reddish brown, Bubfusiforni with a distinct stout stalk-cell. 
Recei>tacle very short, the main axis consisting usually of five superposed cells, with a short pro- 
longation beyond the base of the perithecium, normally of not more than three or four cells, the 
cells all pale yellowish or with brown sufTusions, the septa in all cases usHally hyaline. Api>cnd- 
ages few in number, opaque or nearly so, scattered, some of them very long, curved, and 
greatly exceeding the tip of the receptacle. Spores, 55 x 4 //. Perithecium, 150-1G5 x 45-55 ft. 
Receptacle, main body about 75 x 30 u, its prolongation about 35-40 m. Stalk of pcrithccium 
about 40 X 30 /i. 
375-500 
/ 
This small species is distinguished from its near ally R- Lailmhii^ by ite shorter and 
differently shaped receptacle, concolorous perithecium, and scattered appendnges. The specimens 
examined were obtained from material of its Ijost in the collection of the ^Museum at Cambridge 
labelled '' Germany,*' and were found growing on the insect's abdomen. I have been untible to 
discover any diagnosis of this species in Rubin's '^ Traits" beyond the descri]»tion of the plate, 
and was unaware that no description existed when I referred my own species to this form in the 
pnper cited above. Although the name R, Irevijiei might very properly be retained, in view of 
