I 1 2 TIIAXTER. — MONOGRAPH OF THE LABOULBENIACEiE. 
Laboulbenia MELAXOPU8 Thaxter. Plate LXVI, figs. 4-5. 
Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 187. Dec, 1899. 
Perithelium free except at the base, large, rather deeply suffused with smoky brown, translucent, 
not contrasting; the sulxlistal wall-cells lighter, tapering abruptly to the narrow somewhat incurved tip, 
the inner lip-cells, only, deeply blackened. Receptacle somewhat curved, tapering below to the short 
lender l>;i il cell which is smoky black except at its base, the distal cells gradually suffused with yellowish 
brow Q. Insertion-cell unmodified, blackened externally, the basal cells of the outer appendage becoming 
blackened externally very broad and short, bearing distally a series of erect branches at first more or less 
double, but later multiplied to form a dense tuft covering the expanded upper surface of the cell; the 
basal cell of the inner appendage producing similar but smaller groups of branches on either side, the 
basal cells of all the branches becoming more or less inflated distally, and bearing terminally and sub- 
terminally several (six to ten) branchlets, each of which may become again branched, the branches and 
branchlets distinguished by blackened septa; the ultimate branchlets very slender flexuous hyaline, not 
extending to the tip of the perithecium in the types. Spores about 60 X 4.5 /jl. Perithecium 290 X 70 pu 
Total length to tip of perithecium 675 tx; to insertion-cell 400 /*. Appendages, longer 140 /*. 
( >n a carabid (allied to Harpalusf), at the tip of abdomen. Paris Mus. No. 115, Africa. 
This very distinct species is most nearly allied to L. variabilis and L. orientalis, from which it is, 
however, so distinct that its numerous differences do not need to be pointed out. The material is unfortu- 
nately not abundant, and the mature individuals have their appendages more or less broken in all cases; 
but the manner in which they originate is clearly ssen in fig. 5, a young individual in which neither the 
basal cellfl of the inner appendage nor of the branches have begun to proliferate. 
Laboulbenia Gyrimdarum Thaxter. 
The type of this species 
reexamination of the material available shows that there are two species often associated on our American 
fl • • mi ■ • *« .• . < • . .. . . 
Gi/rini. The 
which is furnished with short blunt projections as in the figure; and by the narrower insertion-region, 
and less abundant appendages: the wall-cells of the perithecium are straight, and the receptacle usually 
geniculate. The second form corresponds so closely to that which I have described as L. chatophora, 
of which a single example was found in the Sharp Collection on Dineutes solitarius from Madagascar (?) 
that I am unable to distinguish them specifically; and this species should therefore be added to the North 
A man ^»r* %-v ¥ * v »»-*-» «-% li !- Xl~ ^ i!_ 1* il • . 1 • m .« ■ __ 
forms 
Monograph, the projections from which are much longer and more sharply pointed, usually black and 
s|»ine-hke. The general fonn of the perithecium is conical, exactly as in L. chatophora, the wall-cells 
p.rally twisted, the plant as a whole usually straight and subfusiform, the insertion-region much broader 
ihan in /,. Gynntdarum, and the appendages more numerous. 
Several specimens in very poor condition have been obtained from British and Italian species of Gyri- 
>n<* (British Museum No. 459 on Qyrwm urinaior lllig., British Isles, and in the Florence Museum on G. 
toootorFayk. and 0. rtnatus Fabr., Italy, which have been referred provisionally to L. Oyrinidanm. 
II «s uncertain, however, whether tlu-y properly belong to this species. Several poor specimens on Qpinw 
from Mexico and from South America have also been examined, but here also the material is not sufficient 
t« render . reliable determination possible, and their reference here is only provisional. 
Peritl 
base, the \v 
Laboulbenia ch.i-topiiora Thaxter. Plate LXVII fig. 19. 
Proc. Am. Acad. Arts and Sr-I V«i yti „ n„ T ..,' ?««. 
July, 1905. 
broad 
but 
rather 1 Z 1 r 7 " ^ ^ ^ "** ^^ *****&* helow ^ % which is slightly, but 
r s.t r - v * ; ,,sting r ,e< ; ^r HM ' black > ^ *^ «■ *v°* ™»<m, *°* ***** ** 
erect shorter, and an externally divergent, much longer, straight, black-brown, spine-like process. Re- 
