THAXTER. — ARGENTINE LABOULBENIALES. 1 7.'3 



out; its axis at a slight angle to that of the stalk; its outline somewhat 

 irregular distally, owing to the presence of slight elevations and 

 depressions which correspond to the successive tiers of wall-cells; 

 the tip bluntly rounded, asymmetrical and not well distinguished. 

 Perithecium l6t)X28-32 /x, its stalk-cell 14-18X10-14 m- Basal cell 

 9X 10.5 At exclusive of foot. 



On the elytra of Tomodcrus forticornis Pic, Llavallol, No. 1982. 



The base of the stalk-cell is in some specimens slightly constricted 

 or so modified that a very small cell may appear to be separated at 

 its base. There is no indication in this or the succeeding species of 

 any sterile cell which might be formed from the terminal spore-seg- 

 ment. I am indebted to M. Pic for determining the host which he 

 finds to be new. 



Autophagomyces nigripes nov. sp. 



Male individxial, slender, usually consisting of three superposed cells 

 bearing a single terminal, or rarely also a subterminal, antheridium. 

 Total length to tip of antheridium 60-70X3.5 fx. Antheridium 26 /j.. 



Female individual. Basal cell relatively large, three to four times 

 as long as broad, slightly broader distally, uniformly suffused with 

 blackish brown, contrasting with the perfectly hyaline stalk of the 

 perithecium; which is slightly longer, broader distally, where it is 

 abruptly bent so as to turn the perithecium at right angles to its axis. 

 Perithecium rather slender, its outline somewhat irregular, bent 

 upward slightly distally; the tip large, broad, well distinguished, 

 blunt-pointed and oblique above; or with the outer, upper lip-cell 

 somewhat prominent. Perithecium 106X26^1, stalk-cell 26-28Xl6/x- 

 Basal cell exclusive of foot, 26X9 /x. 



On the inferior surface of the abdomen of Tomoderus forticornis Pic. 



Cryptandromyces nov. gen. 



Receptacle consisting of two superposed cells, the upper bearing a 

 solitary stalked perithecium, and an appendage formed by a simple 

 series of superposed cells without branches; several consecutive cells 

 of this series at first functioning as antheridial cells, from which sperm- 

 cells appear to be discharged directly through perforations of the wall 

 on the inner side. Perithecia normal, a single ascogenic cell present 

 in the type. 



The determination of the characters which distinguish this genus. 



