260 THAXTKR. —MONOGRAPH OF THE LABOULBENIACE^E. 
Dichomyces in-equalis Thaxter. 
Syn. Peyritschiella nigrescens Thaxter. 
I have already called attention to the fact that Peyritschiella nigrescens figured in my monograph is 
undoubtedly a "reversion" of this species to the Peyritschie I la-condition, a phenomenon which is likely 
to occur in all the species of Dichomyces when the individuals grow under unfavorable conditions, as on 
the legs of the host. The typical D. inceqna/is seems to occur only on Philonthus dehilis and is very con- 
itant in its ehane ters. A single specimen of this host in Dr. Sharps collection, No. 1213, from Scotland, 
was found infested, and the individuals correspond exactly to the American types. 
PEYRITSCHIELLA Thaxter. 
I have already called attention to the close connection of this genus with Dichomyces from which 
it differs only iti its asymmetrical habit, and also to the fact that a majority of the species of the latter 
genus assume the typical Peyritschiella-type when growing under unfavorable conditions as on the legs 
of their hosts. Despite this fact I feel that the two genera are best kept apart, and are sufficiently dis- 
tinguished. 
Peyritschiella protea Thaxter. Plate XXX, figs. 8-9. 
Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 427. April, 1900. 
Peritbecta translucent, brownish amber-colored, rather stout and symmetrically inflated, the sym- 
metrical tip tapering rather abruptly, the apex rather narrow truncate, the lip-edges unmodified. Recep- 
tael ii<- : ii -ly or quite hyaline, consisting of a single basal cell, above which the three typical tiers of cells 
are ^ r.v variously developed: the lowest of these may rarely consist of a single cell, often of three which 
do not project laterally, or in well-developed specimens of as many as twelve or more cells, those external 
to the middle three forming on either side distal external angular usually asymmetrical projections, one 
or both ol wlnrl, may bear terminally one or even two perithecia and typical appendages: the middle 
enea like the lower, when the latter is well developed, subtriangular in form, consisting of sometimes 
19 many as fifteen to eighteen cells, generally somewhat asymmetrical; a single perithecium usually aris- 
ing . hstally from the projecting portion on either side, together with numerous typical appendages: the 
distal tier similar to the middle one, mostly smaller, somewhat asymmetrical, bearing usually a single 
penthecnim above the median cell, though not produced from it, the remaining cells bearing typical 
£***■<; o^'n as long or longer than the perithecium, the .small subtending cell being unusually 
well dehned Subject to great variation, and sometimes producing more than one antheridium. Peri- 
*—■ «*-" X 32 p. Receptacle 270 X 80-100 to 120 X 45 p, Total length to tip of perithecium 
SO -{Mi 
!50 
n Bkd*. W,, w ,,„ , Wtis|l Museum) No m (Thuringia), No. 432, Europe; on 
Gvll ti£H? ' v ' M '— ^ N - 4 ^ Hampstead, England; J .L m atku, fntnditnUaris 
,' J ll InS, ' U,n ' N<> - 4H EttK * C; ° n °***» ** Fresh Pond, Cambridge. On legs, elytra, 
and prothorax. 
In small specimens the two lower tiers may be but slightly developed beari 
of the perithecium being, as in all species. .rrenter tU„ «. ^ ^..._ ~ , 
)earing neither appendages 
pe 
appendages on one side 
an on the other. Occasionally, as in fig. 9, accessory 
n the second tier, and a second antheridium, even, may 
■■rise; but such conditions are abnormal Althl 7/ , * SeC ° nd antnerM,luin ' oven ' may 
anee from those more highly d, e lo \. ^*fi S ' mp,eSt indiv ' duals differ s0 - idel ^ in ^^' 
bere included. Th^ Z^Tt^,^^ \ ™ *« " ^^ «*- this species all the forms 
have h n drawn from this material. 
