718 THAXTER, 



Ilytheomyces simplex nov. sp. 



Perithecium and appendage dark brown. Basal cell of the recep- 

 tacle united to the foot, minute, hardly distinguishable, except its 

 hyaline upper edge: subbasal cell small, hyaline. Appendage stout, 

 subclavate, with a short terminal abortive branch; its axis consisting 

 of five cells of somewhat unequal size; a small androphorous cell 

 obliquely separated from the second on the inner side; in the types 

 bearing only a single short branch bent downw^ard, a similar sterile 

 branch, arising from the cell above, runs parallel to it. Stalk-cell of 

 the perithecium short and stout, hyaline, the basal cell region hyaline, 

 or tinged with brownish above; the secondary stalk-cell somewhat 

 prominent externally. Perithecium dark brown, asymmetrical, dis- 

 tally bent, somewhat inflated below in the region of the two lower 

 tiers of wall-cells; the third tier (tip) short, somewhat darker; the 

 apex abruptly very slightly narrower, slightly paler; the termination 

 broad and somewhat flattened, the lips appressed, not prominent. 

 Spores lo X '2 fx. Perithecia, including basal cell region, 60 X IS n. 

 Appendage 35 X 8 m- Total length 90-97 m- 



Cn the legs of a species of llythca. No. 2131, Sarawak, Borneo. 



This species is smaller than 7. anomaJus to which it is very nearly 

 allied, and difl'ers in the character of its appendage which is more 

 clavate, and produces no external abortiAe branch; while on its inner 

 side a short relatively slender simple branch arises from the third cell, 

 only, bending somewhat downward beside a similar branch which 

 arises from the androphorous cell. No antheridium appears to be 

 developed from the latter in the two mature individuals examined. 

 The perithecium is somewhat different in shape and structure, the stalk 

 cell and basal cells much less well developed than in I. anomahts. An 

 abortive male (?) individual is united to the foot of one specimen. 



On Agromyzidae. 



Stigmatomyces asymmetricus nov. sp. 



Receptacle stout, thick-walled, tapering continuously to the apex 

 of the pointed foot; the basal cell half or two thirds as long as the 

 subbasal, rather strongly curved and paler, or hyaline; the subbasal 

 cell becoming reddish yellow with rough granulation, especially 

 distally, both septa horizontal. Stalk-cell of the appendage reddish 

 amber-colored, not overlapping the receptacle, about twice as long 

 as broad, somewhat prominently rounded below the deeply colored 



