204 TIIAXTER. — MONOGRAPH OF THE LABOULBENIACEiE. 
giuwing in a more or less crowded condition, this pairing of the sexes may not be so clearly marked, 
but it is noticeable that female spores which have begun to develop in positions where there are no male 
individuals in close proximity tend to abort. 
The trichogynes of this genus which have been examined are of the simple type illustrated in fig. 
23, and consist of two cells that form a thick-walled inflated structure, from the distal end of which the 
mall thin-walled receptive papilla is developed in close proximity to the end of the discharge tube of the 
male individual, a condition almost exactly similar to that found in Enarthromyccs. Abnormal males 
1 ly occur in which a second antheridium may be formed below the first, but such conditions are ex- 
ceptional. The male individuals in the different species are all very similar and with the exception of 
D.Floridamu, which is unusually large and possesses a very long discharge tube, can hardly be distin- 
guished from one another. The species, which arc probably more numerous than might be supposed 
from the small number of described forms, have thus far been found only on Staphylinida? and on 
Anthicid*, small beetles inhabiting vegetable refuse of various sorts, and sometimes swept from flowers. 
DIOICOMTCES Anthici Thaxter. Plate XLII, figs. 18-25. 
Proc. Am. Acad. Arts and Sei., Vol. XXXVII, p. 33. June, 1901. 
Male vndimdwd. Form slender, of nearly the same diameter throughout, the basal cell half the total 
length of the individual to the tip of the discharge-tube; the third cell nearly square, the subbasal about 
as large as the terminal antheridial cell, which ends in a distal blunt projection; the discharge-tube arising 
la rally belou the tip, projecting upward from a broadened base, slightly divergent from the main axis, 
nder about as long, or a little longer than, the body of the antheridial cell. Length to tip of antheri- 
dial cell, including toot, 50 ,u: to tip of discharge-tube GO //. Width 8 ft, 
Female individual Often more or less strongly curved, the terminal sterile cell bluntly pointed, 
slightly <urvcd, brownish; the basal cell becoming narrower below, the upper septum convex; tinged 
With brown postenorly as is the rest of the receptacle; the subbasal cell very small, subtriangular; sepa- 
rated Iron, the terminal stenle cell by a somewhat smaller triangular cell. Stalk-cell of the perithecium 
hyaline, long, often about the same diameter throughout; the thick wall becoming gradually thicker 
distallv: the l>enthrr*niTn dmhtKr i°nfl»+,wl *~.\^i__ ^_ • i - ., , s V ? . ,. , . 
the short, stout, broad, blunt tip slightly 
d Ungmshed and nearly symmetrical; the lip-eells forming an unbroken outline, without protrusions 
Spo^s (male 40 X 4 ft (female) CO X 6 ft Peritheeinm 100-110 X 35-45 ft the stalk-cell 75-115 X 
.; ^ithri:": 8 x 12 * the sterile terminai «" i8 - 25 x 7 - 9 *• ™ ^ <° tip 
AntMam flora/is linn. Fresh Pond, Cambridge. 
Collection). 
Californicu.s Laf. California 
t.ined at, ndan '*** <«»«/«»<**«. this is deeidedly the most eommon and has been ob- 
1« i „7iT' rf °", d Wh t re the h ° 5tS Wre foun<1 in P"- "f ^y or weed. It usually 
< ... ,,r the tips , f the elytra an,l ,s sub eet to little variation. It j s most nearly allied to D oncho- 
pW, but ,s easdy .languished by its peritheeial ,*^- 4 „ J ,u . X . " ed , ° , " 1 
y. mtr on a single individual, but occupy more or less restricted regions. 
Thaxt 
Plate XLII, figs. 26-29. 
rli:"':;- £5*£*- ot D - *•** **% ™n CT . 
XXXVII, p. 34. June, 1! 10 i. 
dirty brown, one , t the lin-n-lls m^ . u perithecium, relatively smaller. Peritheeinm 
or .sii g „,iy <;,rv, , „L r, r„ ; z: x t of a we " d r fined ' ,at ™ 1 ' fin ^ r - like ' erect - straight ' 
nenee is also mon or IcJill .hT iT P ? reSS; an lrre « ular ^'erior elevation or angular promi- 
(female) ,5 X 5 ft ^^'^^ ^J* *• ***»*•*■ Spon* (male) 35 X 4 ft 
210-230 
125-140 X 40-45 fi, the stalk-cell 90 a. Total length 
