THAXTER. — MONOGRAPH OP THE LABOULB1 \ i AC] E. .V) 1 .) 
terminal blackish shade on the inner side. Appendages divergent and free through the enlargement ol 
cell V: the outer appendage simple, short, four- to five-celled; the basal cell <>f the inner apj>endage soine- 
J what smaller than that of the outer, bearing a branch on either side similar to the on; r ftp|>endagi tin- 
three straight closely applied in a more or less compact group. Receptacle rather coarsely punctate, the 
basal cell slender below and suffused above the foot, rather short, ami separated from the usually \ery 
long subbasal cell by a more or less distinct constriction; cells III, IV and VI sul>equal, more than half 
the upper margin of cell V free. Perithecia 100-125 X 35-40 /<. Receptacle 220 275 X 45 /«. Ap- 
pendages about 90 fi. Total length to tip of perithelium 290-360 a. 
On elytra and abdomen of Bled ins jacobin us Lee, California ; Sharp Collection, No. 1171. 00 lilcdiux 
basalis Lea, Florida (Henshaw Collection). 
Figure 8 and 10 of the accompanying plate represent the California]! specimens of this speei* and 
fig. 9 one of the smaller stouter forms occurring on BleditLS in Florida. None of the material is in very 
good condition and I have even been led to suspect that the species might prove a depauj>cratc condition 
of L. Phikmthi which, however, in its typical condition would appear to be abundantly distinct. 
Laboulbenia Formicarcm Thaxter. Plate LVIII, figs. 14-15. 
Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 39. June, 1902. 
Basal cells of the perithecium small, compact, not distinguished from the body, which is suffused 
by darker brown shades and tapers from near the broad base, with but slight inflation, t<> the well-dis- 
tinguished tip; which is more or less distinctly curved outward, with subterminal blackish suffusions on 
both sides; the rather blunt, coarse-lipped apex outwardly oblique. Receptacle abnormal ii form, very 
short and stout, the basal cell small hyaline, narrow below, abruptly broader distally below the subbasal 
cell, which is broader than it is long and bulges prominently externally, giving the plant a humpbacked 
habit; cell III small, broader than it is long; cell IV small, squarish separated from cell V which i 
lightly smaller, by a nearly vertical septum. Appendages normal, insertion-cell blackened, but not 
deeply, the outer appendage simple, the three lower cells inflated, the subbasal cylindrical and distinguished 
by dark septa. Spores 30 X 2.5 ft Perithecia 50-60 X 16-18 a, Receptacle 30-:',.-) X IS a. longest 
appendages 90 /*. Total length to tip of perithecium 70-80 p.. 
On all parts of Lasius American** M. and of Formica neogagates If., Cambridge, Mass. 
This very minute and peculiar species appears to be common on small ants in the Cambridge region. 
It is perhaps as nearly related to L. inflate as to any other species, the appendages being very similar in 
both cases. The conformation of the receptacle is, however, unlike any other species. Rickia IPaat- 
matini is thus far the only other member of the family that is known to occur on true ants. 
Laboulbenia microscopica Thaxter. Plate LVI, fig. 17. 
Am 
Dec. 1899 
Perithecium one half or wholly free, pale olivaceous, somewhat inflated, tapering to the relatively 
long narrow subtruncate blackened tip which is bent slightly inward. Lower half of receptacle greatly 
reduced in size, the basal cell hyaline or nearly so, the rest suffused with dark brown, cell III paler, cell II 
broader than long, cells III to V relatively large, bulging prominently outward beyond and belo* the 
insertion-cell. Outer appendage consisting of a basal cell which becomes sub-tnangular through the 
protrusion of its upper outer angle which renders its distal margin twice as broad as the basal cell of tb 
single branch which rises from its upper inner half. The inner appendage arising from a much smaller 
basal cell which produces two branches. Spores about 35 X 3 a. Perithecia 76-93 X 27-34 a. ctal 
140 
45-60 «. Append; es 
about 70 fi. 
Pelmatellus 
One of the very smallest species, in which the perithecium is larger than the whole of the receptacle. 
* from other peculiar characters, the shelf-like projection of the basal cell ol the outer appendage 
