370 



THAXTER. MONOGRAPH OF THE LABOULBENIACE^E. 



a branch on either side externally blackened, somewhat curved outward, and bearing three or four branch- 

 lets which are curved toward the perithecium, externally or wholly brownish toward the base. Perithelia 

 100-110 X 25-30 fx. Total length to tip of perithecium 220-260 fx; to insertion-cell 130-165 fx; greatest 

 width 55 fx. The prolongation of the lip-cell extending about 20 fx or more beyond the tip of the perithe- 

 cium. 



On Pericallus guttatus Chew, Brit. Mus. No. 571, Java. Margins of elytra. 



This well marked species is allied to L. corethropsits and L. fissa, the general characters of the ap- 

 pendages being similar in all three species. The conformation of the tip of the perithecium in the present 

 species, with its obliquely projecting finger-like outgrowth, as well as its general form, large receptacle, 

 and small perithecium, serve abundantly to distinguish it. On the other hand it appears to be allied to 

 L. Coptoderce from Mexico, figured in my Monograph, as are also the two other species above mentioned. 



Laboulbenia insignis Thaxter. Plate LXI, fig. 2. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 43. June, 1902. 



Perithecium free except the base, straight, nearly symmetrical, brown, translucent or transparent, 

 paler below; the wall-cells spiral, describing about half a turn from the base to the tip, which is abruptly 

 distinguished, nearly symmetrical, abruptly opaque below the broadly subhyaline, faintly brownish lips, 

 which are not prominent and form a somewhat angular-truncate or very slightly oblique apex. Distal 

 and basal portions of the receptacle very thick-walled, punctate, abruptly distinguished; the basal cell 

 hyaline or faintly reddish brown, nearly parallel with the perithecium; thesubbasal cell larger and longer, 

 more or less prominently and gradually constricted toward the middle; the straight anterior margin of 

 the distal portion of the receptacle abruptly divergent and formed by cell VI and the secondary stalk-cell, 

 both of which become deeply suffused with black brown, except the base of cell VI which is concolorous 

 with the subbasal cell, from the upper half or less of which it is obliquely separated : cell III and IV subequal 

 and separated by a slight constriction, faintly brownish or subhyaline, their margins slightly convergent 

 toward the thick, jet black, constricted, slightly oblique insertion-cell; the inner margin of which is free 

 from the base of the perithecium. Basal cell of the outer appendage squarish or slightly longer than 

 broad, bearing above its outer upper angle a single opaque contrasting short branch (broken in the types 

 but evidently bearing several branchlets) ; the basal cell of the inner appendage somewhat smaller, bearing 

 a branch on either side; each branch thrice closely branched, their short basal cells, which are subhyaline 

 or faintly reddish brown, each successively bearing two or three divergent stout branchlets; the series 

 ending in branchlets of the fourth or fifth order, which are deep brown, slender, stiff, divergent, thirty 

 or more in all. Spores 185 X 6.5 fx. Perithecia 290-310 X 80-87 /<. Receptacle 365-540 X 150 ft. 

 Appendages (broken) 220-250 fx or more. Total length to tip of perithecium 600-650 /t. 



On inferior thorax of Thijrcoptcrus brevicollis Kl., Madagascar; Berlin Museum, No. 934. 



One of the largest and finest species of the genus, the three mature specimens examined being in good 

 condition except that the tips of the ultimate branchlets are broken in all cases. As far as can be deter- 

 mined from the specimens, one of which is quite young, the basal cell of the outer appendage bears only 

 a single opaque branch, all the rest belonging to the inner appendage. Its relationships to other species 

 are not evident and it is placed provisionally near L. palmella and L. forficulata, both of which occur on 

 allied hosts. 



Laboulbenia Lebise nov. sp. Plate LXI, figs. 3-4. 

 Perithecium faintly olivaceous, deeper below; the cells at or about its base more deeply suffused, 

 especially externally, and more or less distinctly elevated above the surrounding surface; the body of the 

 perithecium tapering more or less evenly and considerably to the tip, which is not abruptly distinguished 

 except by its contrasting blackish color, and is usually turned strongly outward and somewhat sidewise, 

 the translucent lip-edges external, olivaceous. Receptacle rather long and slender, tapering gradually 

 from the distal region to the base; dirty olivaceous yellow; cell III distally, and cell IV almost wholly, 



