Til AXTKK. M()NO(ii; \ I'll OK TIIK LA HO ( ' IJJKX I AOEjE. 



103 



distinct variation from the type represented in fig. 2 is seen in two or three specimens obtained from 0. 

 Ivcvit, collected at Kio Janeiro, in which cell V is abnormally protruded within the insertion-cell and 

 even divided, as in L. prolifemtix. Its color is very pale, and tlx' appendages arc too much broken for 

 comparison, hut it hardly seems distinct. The type is most readily distinguished by its stout receptacle, 

 cells III and IV being especially large, and its relatively very small peritheciiim, which is almost wholly 

 adnate to the receptacle, except the tip. The type is derived from a host collected by Charles Darwin on 

 his famous "Voyage of the Beagle." 



Laboulbenia Ozsenae now sp. Plate LXIII, Fig. 11. 



Rather evenly suffused with dirty yellowish, faintly shaded with brown. IVrithecium more than 

 half free, relatively small; the tip relatively large; the lips prominent, transparent, subtended by blackish 

 brown suffusions. Receptacle normal, cells I and II subequal, cells II I— IV not much smaller and sub- 

 equal, the external walls suffused with brown; cell V triangular, its upper margin oblique. Outer append- 

 age consisting of usually three cells obliquely superposed, the upper bearing two, the rest bearing externally 

 single tapering simple branches about equal to the perithecium in length, distally hyaline ; below, externally 

 and at the base, suffused with rather deep blackish brown: inner appendage consisting of a basal cell 

 which gives rise to an antheridial branch, occasionally on both sides, which sometimes arises at the base of 

 a short sterile branch; the antheridial branch consisting of a single stalk-cell, constricted at its deeply 

 blackened base, above which it is abruptly inflated, assuming a spherical form and bearing three or four 

 large antheridia side by side in a fan-like fashion, their slender tips reaching to the apex of the perithecium. 

 Insertion-cell translucent reddish brown, rather broad and oblique. Total length to tip of perithecium 

 220 /z; greatest width about 60 fi. Perithecium 90-100 X 30-32 ;x. Receptacle to apex of cell V, about 

 150 [i. Antheridia 30 fi. Spores about 55 X 5 /«. 



On Ozaena angulicollis Schm., Berlin Museum, No. 944, Venezuela. This species occurred at the 

 tips of the elytra of its host and is very clearly distinguished, by its peculiar antheridial branches and huge 

 antheridia, from the other forms (L. Pachytelis, L. punctulata and L. torfuom) occurring on Pachyteles 

 and its allies. The types show very little variation in form, size or color. In a few individuals the inner 

 appendage gives rise to two sterile branches, one on either side, from the bases of which the antheridial 

 branchlets arise. 



Laboulbenia tortuosa Thaxter. Plate LXIII, fig. 10. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 206. Dec, 1899. 



Perithecium with hardly more than the tip free, relatively small, externally suffused with smoky 

 brown and concave through the presence of a well defined subterminal hunch, above which the some- 

 what pointed well defined outwardly oblique blackish-brown tip is abruptly differentiated, the lip-edges 

 pale brown translucent. Receptacle very pale reddish or yellowish, variously bent, sometimes at right 

 angles or at an angle of forty-five degrees above cell II; cells I and II straight or more frequently cell II 

 curved strongly, while there is often a less pronounced curvature in the opposite direction immediately 

 above it. Insertion-cell horizontal, about opposite the external hunch of the perithecium. Outer append- 

 age consisting of a very large basal and somewhat broader subbasal cell, the two commonly as broad as 

 or broader than any portion of the receptacle with which they are concolorous; the upper outer angle 

 of both cells marked by the black insertion of a short simple branch, usually broken off, the subbasal cell 

 surmounted by a small flattish cell which bears a simple terminal branch with blackened base like those 

 developed laterally below it: the inner appendage consists of a very small basal cell which usually produces 

 a pair of relatively large antheridia with inflated venters and brown necks distinguished by a deeply 

 blackened basal septum. Perithecia 85 X 27 ft. Total length to tip of perithecium about 275 ft. Ap- 

 pendage, to upper blackened septum 50 /(, by 28 /« wide. Spores about 55 X 5 a (in perithecium). 



On Pachyteles testaceus Horn, U. S. National Museum, No. 28, Arizona. Along the adjacent inferior 

 margins of the thorax and prothorax, on left side. 



