308 THAXTER. — MONOGRAPH OF THE LABOULBENIACE^. 
i 
On PcriraUuB guiattus Chvx., Paris Museum, No. 78; Brit. Mus. No. 571; Hope Collection, No. 
101, Java; Sharp Collection No. 1202. On P. flavoy attains Dej\, E. Indies. Hope Coll. No. 279, Type 
I >n elytra. 
This very peculiar species is well characterized by the unique modification of the tip of its perithecium, 
w hich looks like ;i pair of mandibles. The more slender of the two projections varies somewhat in length, 
and is not always as erect as is represented in the figures, and the whole tip sometimes has the slightly 
bulbous liahit indicated in fi<j. 13. The branches of the inner appendage may be erect, as in fig. 13, or 
strongly divergent on either side, as (ig. 12, which also shows the appearance of the fully matured and 
nearly opaque individual. The species is most nearly allied to L. separata and L. corethropsis. 
LABOULBENLA FORFICULATA Thaxter. Plate LIX, figs. 9-11. 
Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 178. Dec, 1899. 
Perithecium free, straight or somewhat curved, slightly inflated, brown except the basal wall-cells 
which form a mostly hyaline well developed narrow neck-like stalk less than one third as long as the 
ascigerous portion, the latter tapering rather abruptly at the tip, two of the lip-cells prolonged to form a 
pair of erect pointed hyaline symmetrical apposed outgrowths which resemble the tips of a pair of shears. 
Receptacle short, stout, subtriangular, cell 1 hyaline below, forming a short slender usually curved pedicel; 
the body of the receptacle deeply suffused below with blackish brown, the more deeply suffused portions 
oarsely punctate with darker spots. The outer appendage consisting of a basal cell from the blackened 
ipper and outer margin of which arise usually three branches in an anteroposterior series, which are 
curved slightly outward and give rise from their convex side to secondary branches which in turn may 
bear branchlcis in a similar fashion: of the primary branches the inmost is more copiously branched, the 
outmost being small, usually broken; all the branches black externally and brown on the inner margins, 
or wholly opaque, usually constricted on the inner side at the blackened septa, the terminal cells of some 
of the ultimate Inanehlets abruptly inflated at the base: the basal cell of the inner appendage gives rise 
to a branch on either side, the two divergent and very similar in character and mode of branching to 
those of the outer appendage. Perithecium exclusive of neck, 150-200 X 28-38 ft; the neck 35-50 ft 
long. Total length to tip of perithecium 300-450 ft; to insertion-cell 100-150 ft; greatest width 50-70 ft. 
Appendages 175-200 ,«. 
On Thyreoptmu striata* Guer., Hope Collection, No. 302, Madagascar. On elytra. 
This species is very closely allied to L. imiians in its general form and the character of its appendages, 
and is also the nearest known relative of the two large species, L. palmella and L. Kunkcli which occur 
on the allied Mormolyce. It is distinguished from all other species by the shear-like tip of its perithecium. 
The material u scanty and the appendages are badly broken in all the adults. Whether the flask-like 
terminations of the inner appendages represented in fig. 9 are sterile extremities, or peculiar antheridia 
I am unable to determine, although I am inclined to the former view. 
Laboulbenia palmella Thaxter. 
This speck* has been obtained on Mormolyce phylloda, in the Brit. Mus. No. 556, Ding Ding Is. and 
No. 556b, Penang, and in the Berlin Museum No. 975a, Sumatra, on the same host. It appears to be 
constant m its characters and always separable from the much larger L. Kunkelii, which has been again 
556. 
Laboulbkm a corethropsis Thaxter. Plate LIX, figs. 3-6. 
XXXV, p. 168. Dec, 1899. 
I eruhenun, relattvely l ilrR ,, translucent blwn or ycllowish ,, „ , ^.^ fU h 
» ». .™.,»l external !,„,,. ,1,, tip moderately tvcll dillcrcntiatcd, often bent rather abruptly inward, 
wholly bhefeh brotvn or hyalme in the median line, the inner lip-cells smaller and usually more promi- 
nent than the outer snniohmnc /Mf A iJ A ^: M ^ j <i .11 ..* J r 
P 
Recep- 
