380 



THAXTER. MONOGRAPH OF THE LABOULBENIACE^E. 



age similar, often curved slightly outward, becoming tinged with brown. Perithecia 175 X 40 p.; the 

 tip 37 p broad. Total length to tip of perithecium 325-400 /<; to insertion-cell 185-230 p; greatest width 

 55-63 p. Appendages about 175 p (longest). 



On inferior surface of Catascopus sp., Paris Museum, No. 119, New Guinea. 



This species, although closely allied to L. tenuis and L. aristafa, is clearly distinguished from all others 

 by the very peculiar conformation of the symmetrical spreading tip of its perithecium, the detail of which 

 is shown in fig. 5; the black portions at the apex strongly suggesting the end of a pair of horizontal cut- 

 plyers, or blacksmith's tongs. The material, though scanty, is in fairly good condition and shows no 

 essential variation. The differentiation of the three basal cells of the outer appendage is similar to that 

 of E. Maylayensis though less distinct and constant. 



Laboulbenia Thyreopteri Thaxter. Plates LV and LXIV, fig. 15. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 205. Dec, 1899. L. Borneensis Thaxter, 1. c., Vol. XXXVIII, 



p. 28. June, 1902. 



Perithecium nearly free, proportionately large, dull amber-brown, straight, narrower at the base, 

 the inner margin slightly convex, the outer concave through the presence of a prominent subterminal 

 hump, which is suffused with blackish brown, the suffusion often involving a fainter discoloration of the 

 subbasal wall-cell below it; the tip small, prominent, and abruptly differentiated, blackish with broad 

 hyaline lips. Receptacle slender, the basal cell black, opaque, mostly curved below, very slender; the 

 subbasal cell broader, suffused with blackish, mostly verrucose or coarsely punctate, the remaining cells 

 normal and concolorous with the perithecium. Insertion-cell thick and narrow. The outer appendage 

 simple, its basal cell long, undifferentiated; the basal cell of the inner appendage shorter, bearing a branch 

 distally on either side, all the branches similar, crowded, concolorous with the perithecium, erect, straight 

 or bent slightly toward the perithecium, the inmost in contact with it. Spores 55 X 4 p. Perithecia 140- 

 175 X 14-25 p. Total length to tip of perithecium 340-400 p; to insertion-cell 250-270 p. Appendages 

 120-140 p. 



On the elytra of Thyreopfervs flavosignatus Dei, Brit. Mus. No. 561, Port Natal, Africa. On Thyre- 

 opterus sp., Paris Museum, No. 125, Africa and Sharp Collection, No. 1201, South Borneo. 



A reexamination of these forms shows that there is no essential difference between the African and 

 Borneo material, although the pale yellow color of the latter, Plate LV, which is formerly distinguished as 

 L. Borneensis, its more prominent perithecial hunch, the absence of the blackened induration of the basal 

 cells of its receptacle, and some other points, give it a somewhat different appearance. The species is a 

 peculiar one, and most nearly allied to L. ccratophora and others of the curious group of forms which occur 

 on this and related hosts. 



Laboulbenia finitima Thaxter. Plate LX, figs. 21-23. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 176. Dec, 1899. 



Perithecium one half to two thirds or more free, olivaceous brown, lighter distally, becoming wholly 

 dark brown, straight or curved outward, rarely inward; the tip broad, rounded, generally not well differen- 

 tiated, blackish. Receptacle relatively small, the basal cell hyaline or yellowish, the rest concolorous 

 with the perithecium; cells III-V lighter, cell VI extending down almost or quite to cell I. Appendages 

 brownish or pale olivaceous, the outer simple, its basal cell twice as long as broad, externally somewhat 

 rounded and more deeply tinged with brown; the basal cell of the inner appendage half as large, bearing 

 a branch on either side which is usually furcate above its basal cell : all the branches erect, closely appressed, 

 and often bent terminally across the tip of the perithecium which they scarcely exceed. Perithecia, aver- 

 age 125 X 45 p. Total length to tip of perithecium, average 240 p\ to insertion-cell 145-150 p; greatest 

 width 48-50 p. Appendages 30 p. 



On PericaUus guttatus Chev., Paris Museum, No. 78, Brit. Mus. No. 571, Java; on P. caruleovircn* 

 Tat., Brit. Mus. No. 570, Singapore. On the legs. 



