408 



THAXTER. MONOGRAPH OF THE LABOULBENIACE^E. 



as long as broad, its distal septum blackened; when simple, bearing a single branch, if divided, several; 

 the basal cell of the outer branch usually rather short and somewhat suffused, commonly bearing two 

 branchlets. The basal cell of the inner appendage usually smaller than that of the outer, sometimes 

 equal, and like it simple or divided; when simple, bearing a branch on either side, or more if it is divided. 

 All the branches of both appendages hyaline or nearly so, mostly once branched above their basal cells. 

 Spores about 55 X 4.5 Perithecia 120-150 X 35-50 //. Total length to tip of perithecium 275-400 ft; 

 to insertion cell 200-340 [i. Appendages, longest 300-400 (i. 



On Cliviria collaris Herbst, Hope Coll. No. 348, and Brit. Mus. No. 450, both from England. On 

 Clivina jossor Linn., Hope Coll. Nos. 353, 275 and 475, England; No. 295, "Europe"; Florence Mus., 

 Italy; Berlin Mus., No. 886, on C. fossor Linn. Usually on elytra and superior prothorax, but occur- 

 ring elsewhere. 



The typical unmodified form of this species is represented in fig. 5, a British specimen, which is taken 

 as the Type (B. M. No. 456) ; but the material examined shows very considerable variation similar to 

 that which characterizes the "Clivina" group generally, and here usually manifests itself in abnormal 

 divisions of cell IV, and of the basal cells of the appendages. Apart from other differences, the species 

 is distinguished from others in this section by the black septum and suffusion which occur at the base of 

 the outer branch of the outer appendage. It does not usually occur abundantly on a given host, but on 

 the other hand does not appear to be uncommon. A form identical with this, or very closely allied was 

 obtained on C. Australasia Boh., from Luzon, Philippines in the Berlin Museum No. 885. 



Laboulbenia barbata Thaxter. Plate LXI, fig. 11. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 160. Dec, 1899. 



Perithecium large, pale yellowish or brownish becoming slightly tinged with amber-brown, often 

 symmetrically inflated and tapering gradually to the tip, which is brownish below, becoming black on the 

 inner side, the lips subhyaline, turned slightly outward. Receptacle concolorous with the perithecium, 

 normal except that cell V is greatly enlarged and extends upward covering nearly one half of the inner 

 margin of the perithecium, bulging strongly outward and carrying out the insertion-cell, which is thus 

 made lateral in position. Insertion-cell externally concave or indented. The outer appendage consisting 

 of a small roundish basal cell giving rise to two, rarely more, branches antero-posteriorly, which are usually 

 once branched near the base, the branchlets very elongate, slender, attenuated, curved outward and 

 downward : the inner appendage consisting of a similar basal cell from which arise usually two branches, 

 one on either side, similar to those of the outer appendage, the whole forming a hanging beard-like tuft. 

 Perithecia 190-200 X 55-60 p.. Total length to tip of perithecium, average 400 \v, to insertion-cell, 

 average 190-200 ft. Appendages, longest 450-650 /i. Spores 100 X 6 fi. 



On Morio Georgia' Pal., Brit. Mus. No. 690 (Biologia Collection), El Zambador, Mexico; on M. 

 simpler, Dej., Brit. Mus. No. 581, Cayenne; on M. monilicornis, Latr., Hope Collection, No. 289, "North 

 America." On the elytra. 



This very distinct species, which was found in one instance in company with L. Morion is, cannot 

 be confused with any other known form: its pendent appendages and the monstrous development of cell 

 V, as well as the form of its perithecium, serving clearly to distinguish it. The receptacle is usually some- 

 what shorter than is shown in fig. 11; but the material, which is sufficient and in good condition, shows 

 no variations of importance. Although no tendency to an irregular division of the distal cells of the 

 receptacle, or of the basal cells of the appendages, has been observed, this species seems as nearly allied 

 to L. pallescens and to the small "Clivina'" group as to any others, and is therefore included here. 



Laboulbenia Polyhirmve Thaxter. Plate LXV, fig. 1-3. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 195. Dec, 1899. 



Perithecium rather slender, almost wholly free, nearly hyaline or faintly brownish yellow; tapering 

 slightly toward the moderately well differentiated tip which is usually bent slightly outward, more or less 



