THAXTJOR. — 



MONOGRAPH OF TH 10 LA HOT LB ION I A< '10.10. 



419 



throughout to the base, the basal cell more deeply suffused distally, and protruding somewbai anteriorly 

 below the subbasal cell, which is pale dirty yellowish-brown, inconspicuously granular-punctate: the distal 

 portion dark dirty brown, the cell-boundaries hardly visible. The insertion cells small, giving rise to 

 numerous (a dozen or more, for the most part broken in the type) primary slender clavate cells, from which 

 closely septate short branehlets arise externally. IVrithecium 1X5 X (55 //., not including the marginal 

 cell, which is 18 /z broad. Receptacle 300 /<. Appendages (broken) about 50 />.. Total length to tip of 

 peril hecium 450 [i. 



On Dmeutes spinosus, Fabr., Java; Sharp Collection, No. 1086. 



A single specimen, only, of this species has been examined, which is so deeply suffused that it is not 

 possible to determine with certainty whether the peculiar cell which extends from the insertion region to 

 the tip of the perithelium should be regarded as a prolongation of cell V, as it manifestly is in L. fallax, 

 or as an abnormally developed wall-cell of the perithecium itself. It is so closely associated with the 

 extreme tip of the perithecium that I am rather inclined to the latter view, but it will be necessary to see 

 younger individuals before this can be determined. The species is not likely to be confounded with any 

 other in this group by reason of the rounded form of its broad perithecium. 



Laboulbenia Orectochili Thaxter. Plate LXVII, figs. 10-11. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 191. Dec, 1899. 



Perithecium free except at the base, more or less evenly suffused witli smoky brown, with a subter- 

 minal external blackish patch, nearly symmetrical and straight, slightly inflated, tapering gradually to 

 the hyaline tip which is surmounted by a median straight pointed purplish tooth-like projection, formed 

 by the outgrowth of one of the lip-cells; the inner lip-cells forming a small hyaline or partly purplish 

 lateral papilla. Receptacle elongate, cells I and II stout, the latter slightly if at all narrower distally, cells 

 IV and V and the basal cells of the perithecium darker brown, the rest very pale yellowish or purplish 

 brown, finely punctate, the dots scarcely visible except in the more deeply suffused areas. The insertion- 

 cell broad, blackened, extending completely across the distal margins of cells IV and V. Appendages 

 consisting of an inner and outer basal cell, giving rise in all to from five to ten erect subcorneal prominences, 

 each of which becomes separated as the basal cell of a very short two-celled branch of which only a black- 

 ened basal portion remains in mature specimens, the rounded purplish slightly inflated terminal portion 

 of the upper cell usually breaking off above its blackened slightly constricted basal half. ( >f the branch* s, 

 that borne by the protuberance first formed from the outer basal cell, is always somewhat larger and more 

 prominent than the rest. Perithecia 190 X 59 //. Total length to tip of perithecium 475-0S0 /«; to in- 

 sertion-cell 400-550 ft. 



On Oredochilus cordatus Reg., Paris No. 99, "Asia." On elytra. Berlin Mus. No. 805, on O. 

 scmivestitus Guer., Siam. Sharp Coll. No. 1081 var. on O. oblongiusculus Reg., "Pedong." 



This, together with the two succeeding species, form a well marked group in this section of the genus 

 owing to the normal differentiation of the insertion-cell and the production of a variable number of basal 

 cells, each of which bears but a single appendage, distinguished by a broad black septum. In the type 

 form the appendages are more numerous (fig. 11, on O. cordatus), and the color darker. The extreme 

 of variation, so far as it has been observed, is illustrated by fig. 10, on O. oblongiusculus, where but two 

 basal cells are developed, and a slight difference in the projections from the tip of the perithecium is observ- 

 able. The species is most nearly allied to L. strangulate, from which, as well as from L. coarctata, it is 

 at once separated by the perithecial projections. 



Laboulbenia strangulata Thaxter. Plate LXVI, fig. 20. 



Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 202. Dec, 1899. 

 Perithecium one third to one half free, dark brown, concolorous below with the distally almost opaque 

 receptacle; symmetrical, straight; the tip undifferentiated, bluntly rounded except for a hyaline flattish 

 terminal papilla formed by the projection of one of the external lip-cells. Receptacle slender, cell I usu- 



