40 PROCEEDINGS OF THE AMERICAN ACADEMY. 



A species well distinguished by its contrasting coloration, minute 

 receptacle and large dark perithecium, which is characteristically 

 hyaline externally at the base. The material is abundant and in 

 good condition and does not seem to vary towards any of the varieties 

 of L. Homophoetae which is its nearest ally. 



Laboulbenia armata nov. sp. 



Hyaline becoming faintly olivaceous, except the basal cell. Recep- 

 tacle much smaller than the perithecium, the hyaline basal cell larger 

 than the rest of the receptacle, from which it is separated by a hori- 

 zontal septum; cell II about as large as cell III + IV, rounded, 

 separated by symmetrical and oblique septa from cell III + IV and 

 cell VI, which is small and somewhat oblique; cell V small, lying 

 opposite the insertion-cell, against the base of the perithecium, the 

 inner half of which it forms. Insertion-cell narrow, opaque and in- 

 distinguishable from the basal cells of the appendages. Basal cell 

 of the outer appendage small, quite opaque, longer than broad; 

 producing a terminal and a subterminal inner branch, each usually 

 once branched; the outer branchlet of the terminal branch short, 

 curved outward, externally blackened; the other branchlets rather 

 ' long, slightly flexuous and tapering; basal cell of the inner appendage 

 very small, rounded, prominent, hyaline, free, bearing a short branch 

 of two or three small cells on either side. Perithecium diverging from 

 the appendages, relatively large long and hardly inflated, wholly 

 free; the tip well distinguished on both sides, darker; the apex paler, 

 surmounted by an outcurved, purplish, tooth-like external or subla- 

 teral process, formed by one of the lip-cells; the other lip-cells hyaline, 

 somewhat prominently rounded and subtending this process on the 

 inner side; the blackened insertion of the trichogyne usually distinct 

 on the left side of the purplish brown tip. Perithecium 120-125 X 

 24-30 £i; the horn-like process about 12-14 /i long. Receptacle 

 70-80 X 25 At. Appendages, longest, 175-210 n- Total length to 

 tip of perithecium 175-210 n. 



On the elytra of Oedionychus sublineatus Jac, No. 1772. (Bio- 

 logia Coll.) Teapa, Mexico. 



The appendages of this species are fundamentally similar in the 

 origin and arrangement of their branches to those of L. Homophoetae, 

 but the form is otherwise quite peculiar. 



