318 



MONOGRAPH OF TIIE LABOULBENIACE^. 



inferior surface of its host, near the base of the middle pair of legs. Specimens from York, 

 Maine, and the vicinity of Cambridge indicate that the species is very constant and well marked. 



Laboulbenia vulgaris Peyritsch. Plate XIII, figs. 1-3. 



Peyritsch, Sitz. der Wien. Acad. Vol. LXVIII, p. 248, Plate II, figs. 17-26; Sorokin, Veg. Paras, of Man, etc, Vol. II, p. 417, 

 Plate XXXII, figs. 760, 764, 766-769 ; Winter, Die Pilze Deutsch. Baud. II, p. 920, fig. 1, 922; Berlese, Malpighia, 

 Vol. Ill, p. 56 ; Saccardo Sylloge, Vol. VIII, p. 912 ; Thaxter, Proc. Am. Acad. Arts and Sci. Vol. XXVII, p. 44. 



Hyaline, becoming more or less suffused with blackish brown. Perithecium becoming 

 blackish, usually rather narrow, its apex large and blunt, commonly bent outward. Appendages 

 consisting of two basal cells, the outer usually much the largest ; the single outer appendage 

 usually simple, or bearing two or three usually simple branches from its second or third cell ; 

 the inner producing usually two very short branches ; the insertion-cell placed opposite the 

 middle of the perithecium. Receptacle often rather elongate, the basal and sub-basal cells form- 

 ing a stalk, rather abruptly widened distally, and colorless or more or less suffused about the sep- 

 tum. The distal portion of the receptacle also more or less suffused. Spores, 54 x 4 /j,. 

 Perithecia, 110-150 x 44-48 /x. Appendage, longer, 185 Total length to tip of perithecium, 

 220-300 ft. 



On Bembidium mexicanum Dej., B. Icevigatum Say, and many undetermined species; Maine 

 to Washington and Mexico ; on Trechus chalybeus Mann., California ; on Bembidium littorale Pz., 

 B. lunatum Duft. , B. fasciolatum Duft., B. punctulatum Drap., B. obsoletum Dej., B. Andrece 

 Sch., B . flammxdatum Clair., B. decorum Pz., B. femoratum Sturm, B. bipunctatum Duft., Europe. 



The species of Laboulbenia which occur on members of the genus Bembidium are in need of 

 further study than I have been able to give them ; and since they are very apt to occur in a 

 rather imperfect condition, it is a matter of some difficulty to classify any considerable amount 

 of material that has been obtained from this source. From my own materials 1 have selected 

 this form to represent the present species ; since, although it is not at all certain that it is the 

 only one which Peyritsch included under this name, it is certainly one of the forms that he 

 had before him in drawing his figures. It is characterized by its stout outer appendage, which 

 may be quite simple, or may produce a small group of short, stout branches above its third cell. 

 "The two figures represent typical specimens, the one (fig. 2) from B. mexicanum collected in 

 Mexico, the other from B. Icevigatum from Kansas. Specimens in my possession from B. 

 Andrece taken in Austria, and from an undetermined species from the Province of Quebec col- 

 lected by Dr. Richards, do not differ in any respect from the form which is everywhere com- 

 mon on various species of this beetle. Certain forms occur, nevertheless, which seem to some 

 extent intermediate between this species and that subsequently described as L. pedicillata, which 

 may also have been seen by Peyritsch and confused by him with L. vidgaris. That he had no 

 very distinct idea of the distinguishing characters of his species is indicated by his assertion 

 that he had observed it on the staphylinid beetle Deleaster dichrous, which is most improbable. 

 The two species last mentioned are readily separated by the relation in position in either case 

 between the insertion cell and the base of the perithecium, indicated in the figures, even if 

 other more important distinctions like the character of the appendages and the form of the peri- 

 thecium were not available for this purpose. The figures given in the present instance are not 

 very satisfactory, the form of the perithecium not being well shown. 



