MONOGRAM OF THE LABOULBENIACEiE. 



335 



species much shortened about the base, and in some cases show a tendency to form a stout stalk, 

 the sub-basal series occupying almost the whole length of the pcrithecium. The types examined 

 were derived from specimens in the Museum of Comparative Zoology. 



Laboulbenia melanotheca Thaxter. Plate XIX, fig. 4. 



Proe. Am. Acad. Arts and Sci. Vol. XXX, p. 472. 



Tinged with pale I'eddish brown, except the nearly black pcrithecium. Pcrithecium long, 

 straight, symmetrical, sub-cylindrical or but slightly inflated, narrowed abruptly to the sym- 

 metrical apex, its basal wall-cells elongated to form a neck-like stalk about one-fourth as long 

 as its main body, projecting from the receptacle at an angle to its long axis towards and 

 beyond the appendages. Appendages as in L. mexicana, hardly exceeding the perithecium in 

 length, consisting of two basal cells : the outer producing an outer and an inner branch 

 either simple or once branched ; the inner producing single branches on either side. Recep- 

 tacle elongate, expanding very gradually from the base, distally abruptly rounded and con- 

 tracted below the insertion cell on one side and the neck-like base of the perithecium on the 

 other. Spores, 95 x 5.5 fi. Perithecium, 220-245 x 60-65 /x, its neck-like base about 75 x 30 1*. 

 Receptacle about 515 x 100 Total length to tip of perithecium, 800-835 /x. 



On Gtalerita mexicana Chaud., Nicaragua. 



This species has been previously referred to by the writer as a possible hybrid between L. 

 mexicana and L. Galeritai. It seems on more careful comparison, however, to be abundantly 

 distinct from either. The neck-like base of the perithecium formed from the elongated basal 

 wall-cells of the perithecium lie wholly below the ascogenic cells. The eight types were found 

 on the elytra of their host in company with L. mexicana. 



Laboulbenia longicollis Thaxter. Plate XIX, figs. 5-8. 



Proc. Am. Acad. Arts and Sci. Vol. XXVIII, p. 172. 



Perithecium becoming suffused with dark brown, straight, thick-walled, often slightly inflated, 

 the apex short, rather large, abruptly distinguished, black, its lips hyaline, turned slightly 

 inward. Appendages consisting of two basal cells, the inner smaller, bearing distally two 

 rounded cells, the upper surface of each blackened and bearing two to five branches, which 

 arise side by side and spreading laterally may be successively and similarly twice branched, 

 the whole having a fan-like habit, the ultimate branches usually one to three in number, either 

 bearing two to three long-necked, straight antheridia, or sterile, somewhat elongate, straight and 

 tapering. The outer basal cell superiorly and externally blackened, the blackened ridge extend- 

 ing obliquely outward and downward nearly to the base, bearing a row of closely set branches 

 of variable number (three to five) which are successively three to five times dichotomously 

 branched, the ultimate branches suffused with brown, straight, slender, tapering, arising from a 

 short characteristically bent basal cell ; the basal cells of all the main branches hyaline, slightly 

 inflated inwardly, the septa black, contrasting. Receptacle large, cell V as large or nearly as 

 large as cell IY, the neck of the perithecium about 175 \i in length. Spores, 75 x 6.5 fi. Peri- 



