MONOGRAPH OF THE LABOULBENIACEiE. 



347 



ous, tapering, more or less divergent branches, which arc themselves more or less branched ; 

 the inner basal cell becoming several times divided and giving rise to numerous branches 

 densely crowded and similar to the external ones. Receptacle consisting of a long sub-cylin- 

 drical basal cell, the sub-basal cell shorter and broader, cells I1I-V unusually large, causing this 

 portion of the receptacle to bulge outward in an evenly rounded and characteristic fashion. 

 Perithccia, 166 X 55 p. Appendages (longest), 150 p. Receptacle, 215 n long, its basal cell 90- 

 110 x 25 — 40 fx. Total length to tip of perithecium, 315 p ; greatest width, 75 fi. 

 On Bembidium sp., Connecticut, Washington. 



This species, although based on scanty material, seems quite distinct from its nearest allies, 

 L. luxurians and L. compacta. Although the general arrangement of the appendages is similar 

 in the present species, their flexuous, divergent, tapering habit is quite different from that of the 

 two forms just mentioned, from which it is also distinguished by its larger size and peculiarly 

 shaped receptacle. It occurs on the legs of a very small metallic-green Bembidium. 



Laboulbenia minima Thaxter. Plate XXI, figs. 8-11. 



Proc. Am. Acad. Arts and Sci. Vol. XXVIII, p. 175. 



Punctate, suffused with olive-brown, becoming nearly opaque, except the hyaline basal cell. 

 Perithecium becoming rounded in outline, short, nearly straight, the apex broad, truncate, 

 coarse-lipped, distinctly punctate and nearly opaque at maturity. Appendages arising from a 

 rounded base of insertion, composed of several cells and not distinguished from the receptacle, 

 densely clustered, the lower segments nearly hyaline, oval or rounded, with black septa, the ulti- 

 mate branches cylindrical, hyaline, strongly curved towards the perithecium. Receptacle very 

 short and stout, the basal cell hyaline, the rest nearly opaque and punctate. Spores, 40 3.5 fi. 

 Perithecia, 80 x 40-48 /x. Appendages (longest), 75 fi. Total length to tip of perithecia, 145- 



150/*. 



On Callida pallidipennis Chaud., Panama. 



With the exception of L. Hageni this is the smallest species of the genus. The perithecium 

 is proportionately large, sometimes very large, as in fig. 8, the distal portion of the receptacle 

 being much reduced. The appendages resemble to some extent those of L. luxurians, and their 

 original relations are clearly shown in fig. 10, the inner basal cell producing a row of branches 

 placed antero-posteriorly on either side. The appendages are usually almost entirely broken off 

 as in fig. 8. Abundant material was obtained from the legs and elytra of a specimen of its host 

 in the Museum of Comparative Zoology. 



Laboulbenia Quedii Thaxter. Plate XVII, fig. 7. 



Proc. Am. Acad. Arts and Sci. Vol. XXVIII, p. 167. 



Perithecium rather small, straight, suffused with brownish, darker externally just below 

 the apex, the lips turned outward, the outer hyaline, the inner blackened. Outer appendage 

 consisting of a rather large basal cell bearing two branches, the outer strongly curved out- 

 ward, usually bearing two secondary branches from its basal cell, suffused with blackish ; the 



