TIIAXTER. - 



MONOGRAPH OF THE LABOULBENIAC E I . 



117 



a shorter much broader paler outgrowth, turned inward nearly at right angles: of the two outer lips one 

 forms merely a rounded prominence, while the other grows out into a large prominent brown blunt-tipped 

 tooth-like projection, which becomes bent slightly outward and sideways. Receptacle rather long and 

 slender, sufl'used with brown, the darker distal portion marked by fine transverse indistinct striatums. 

 The basal cells of the appendages more or less indistinguishable and giving rise to indistinct prominences 

 bearing numerous branches, the basal cells of which are short, inflated distally, and bear a terminal anil 

 external series of closely septate branchlets; the latter once or twice branched, the septa dark, the whole 

 forming a dense tuft about half as long as the perithecium. Spores 60 X 0 \i. Perithelium 200 X 70 ft. 

 Total length to tip of perithecium 550 /<; to insertion-cell 400 //. Longest lip-prominence 35 ft. 



On the elytra of Maerogyms sp., Brit. Mus. No. 4SG, and on Macrogyrus obliquatus Aube, Sharp 

 Collection No. 1088, Timor, E. Indies. 



The type of this species has unfortunately been so injured that it is not possible to make a drawing 

 of the specimen. The tip of its perithecium, however, which is its most distinctive feature is represented 

 in Fig. Hi. The host was given in the original description as Dineutes sp. with a query, but it seems 

 probable that it is in reality a species of Macrogyrus. The form obtained from the Sharp collection on 

 this genus is not in good condition, nor are the peculiar perithecial outgrowths as well developed. A 

 figure of one of these specimens will be given in a subsequent contribution, unless more typical material 

 can be obtained. 



Laboulbenia Dineutis Thaxter. Plate LXVII, figs. 17-18. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 171. Dec, 1899. 

 Perithecium free except at the base, dark brown, the inner margin straight, the outer curved from 

 the base to the tip, which is not well differentiated, the lip-cells inconspicuously modified to form an inner 

 tooth-like brown prominence curved inward, and a median small brown rounded elevation, which is 

 covered by an outer hyaline externally brown broad irregular elevation. Receptacle elongate or rather 

 short, dark brown, inconspicuously punctate. Appendages arising from a number of basal cells one of 

 which, lying somewhat at the right, is more or less conspicuously prominent and more deeply suffused; 

 the basal cells of the branches somewhat inflated distally, and bearing several branchlets, which may in 

 turn be branched; the lower portion of the branches made up of short cells with contrasting black septa ; 

 the distal portions, when unbroken, slender hyaline elongate, without dark septa, much longer than the 

 basal portion. Perithecium (Ceylon) 275 X 72 fi, (India) 140 X 40 ft. Total length to tip of perithecium, 

 (Ceylon) 1 mm., (India) 400 ft, (Madagascar) 350 /i. Appendages, (Ceylon) 200 ji. Spores, (Ceylon) 

 75 X 6 ft. 



On Dineutes subspinosus King., Paris, Nos. 33 and 34, Madagascar and Isle dc Prance; Hope 

 Collection, No. 236, no locality. On Dineutes spp., Hope Collection, Nos. 230, 231, 232, and 235, Bengal, 

 Pondicherry (India), Ceylon, Mauritius. On Dineutes, Brit. Mus. No. 483, Nilgiri Hills, India. Berlin 

 Museum No. 808b on D. subspinosus, Klg., Pondicherry and No. 808, Isle de France, No. 809 on D. 

 Iudicus, India. On margin of elytra and tip of abdomen. 



This apparently common species is one of the least well defined members of this section. The t i p 

 of the perithecium varies but slightly in the conformation and coloration of the projections at its apex. 

 A few specimens show slender hyaline filaments arising distally from the appendages, but in most case s 

 the latter are not in good condition. As will be seen from the above measurements, the species appears 

 to be subject to great variation in size. It is most nearly related to L. heterocheila and to L. denticulata 

 which may prove to be a mere variety. 



Laboulbenia denticulata Thaxter. Plate LXVII, figs. 7-9 and 12-13. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 170. Dec, 1899. 

 Perithecium free, olivaceous with blackish shades below the paler tip, rather narrow, straight; the 

 tip broad, one of the inner lip-cells forming a short brown conical terminal prominence which is straight 



