THAXTER. — 



MONOGHAPII OF THK LAHOULHKNIACK/K. 



VI and the basal cells of the receptacle more or less tinged with olive-brown forming an elevation so thai 

 the perithecitim appears indented below, all the cells excepl cell I marked by hue I nins verse strialions. 

 Outer appendage simple, the basal cell rather large, often externally indented near the base, the second 

 and (bird cells nearly equal, narrower than the basal cell and the cells immediately above them; I lie rest 

 of the appendage tapering to the hyaline attenuated elongate distal portion ; the inner appendage consist- 

 ing of a basal cell one third as large as that of the outer and bearing a single branch on either side, one 

 or both of which may be elongate much like the outer appendage, bearing one or two short slender antheri- 

 dial branches near the base, which are bent rather abruptly upward from their point of origin ; the blanches 

 all distal ly hyaline and attenuated; the basal cells faintly reddish. Perithecia, average 110 X 37 /<. 

 Total length to tip of perithecinm 260-280 /*; to insertion-cell 250-275 /x; greatest width 75 //. Append- 

 ages, longest 375 fi. 



At base of posterior legs of Pericallus cwrulcovircns Tat., Brit. Mus. No. 570, Singapore. 



This species is well defined by its general form, the relation of the perithecium to the receptac le, and 

 the conformation of the outer appendage, which is similar to that of L. aristata; but especially from the 

 peculiar conformation and twist which characterize the tip of the perithecium. The four mature speci- 

 mens examined are all in good condition and show no variation. 



Laboulbenia aristata Thaxter. Plate LX, figs. 27-29. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 158. Dec, 1809. 



Perithecium less than one half free from the receptacle, pale amber-yellow, straight and symmetrical 

 or nearly so, the tip well distinguished, symmetrical, blackish, the lip-cells symmetrically rounded and 

 protruding slightly on either side, their distal margins straight and horizontal, or nearly so. Receptacle 

 concolorous with the perithecium, cell I tinged with brown, a brownish shade below the base of the peri- 

 thecium, cell IV bulging distally where it is rather faintly suffused with blackish. Outer appendage 

 simple, the basal cell more than twice as long as it is broad, the two cells above it abruptly narrower and 

 equal; two or three of the cells above these broader with thicker walls, the rest of the appendage tapering; 

 the whole rigid, straight, erect or bent toward the tip of the perithecium, a part of which it may overlap; 

 inner appendage consisting of a small basal cell bearing a very short one- or two-celled branch on either 

 side. Perithecia 95-110 X 30 //. Total length to tip of perithecium 2-10-260 ti; to insertion-cell 185- 

 200 ll; greatest width 60 /i. Appendages 260-330 [x. 



On a carabid (near Pericallus), Hope Collection, No. 322, Bouro, East Indies (A. R. Wallace). 

 On superior margin of prothorax. 



This species bears some resemblance to L. erecta, from which it differs in the conformation of the bul- 

 bous tip of its perithecium, the relation of the latter to the insertion-cell and the enlargement of the recep- 

 tacle below the insertion-cell, which is slightly bent (fig. 27), the outer appendage lying across or against 

 the tip of the perithecium. 



Laboulbenia platystoma Thaxter. Plate LX, figs. 4-5. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 194. Dec, 1899. 

 Perithecium free except at the very base, straight, rather long and narrow, pale amber-yellow becom- 

 ing slightly tinged with brown, slightly and symmetrically inflated; the tip black, opaque, the lip-cells 

 forming an abruptly spreading almost flat symmetrical termination with a slight median indentations, 

 two of the lips forming a small median hyaline truncate cone, the other two arching over them from the 

 outer and inner side, wholly opaque except their inner margins, the blackened part not quite meeting in 

 the median line. Receptacle medium, pale amber-yellow becoming tinged with brown distally. Outer 

 appendage mostly simple, the basal cell about twice as long as broad, often slightly inflated, the rest of 

 the appendage much narrower, straight, rigid, tinged with brown, tapering somewhat distally; the inner 

 appendage consisting of a basal cell about half as long as that of the outer, producing a branch on either 

 side; the branch usually bearing an antheridial branchlet near its base, the branches and the outer append- 



