THAXTER. NEW LABOULBENIACEAE. 25 



symmetrically divergent, or the former lateral in position. The append- 

 age consisting of a free, relatively long, distally somewhat enlarged basal 

 cell, and two to four much smaller distal cells ; the lower of which give 

 rise from their upper angles to short branches bearing free antheridia, 

 usually in pairs ; the distal cells producing sterile branches which are 

 more or less elongate, hyaline, and sparingly branched. Stalk-cell of 

 the perithecium very large and stout, inflated or distally enlarged below 

 the rather inconspicuous basal cells ; body of the perithecium relatively 

 small, becoming amber-brown, curved strongly inward, tapering slightly 

 to the blunt unmodified tip. Spores 35 X 3 /n. Perithecia 60-90 X 

 18-28 iji, the stalk 90-100 X 20 /*. Receptacle 30-40 X 18 /x. Append- 

 ages 150-200^. 



On the thorax prothorax and adjacent legs of Stilicus angularis Lee, 

 on the right side ; Arlington, Mass., June. 



Although very different from the type of Stichomyces this species 

 seems referable to no other genus, although it might possibly be included 

 in Rhizomyces. 



Rhachomyces anomalus nov. sp. 



Receptacle small, tapering to the large sharply pointed foot, the basal 

 cell relatively large, the subbasal bearing a pair of stout, bristle-like, 

 simple, black-brown, septate, hyaline-tipped appendages distally and 

 posteriorly ; the cell above it bearing a similar pair arising close to 

 the base of the short stalk-cell of the perithecium ; the terminal portion 

 of the receptacle consisting of one or two small appendiculate cells, 

 anterior to the stalk-cell : the five or six appendages relatively large, 

 appressed, together more or less completely surrounding the base of the 

 perithecium, and sometimes extending nearly to its tijj. Perithecium 

 tinged with purplish brown or nearly hyaline, the stalk and basal cells 

 small and concealed, the body relatively long, very slightly inflated, 

 tapering.to the blunt tip, which is bent slightly toward a large, curved, 

 horn-like, hyaline outgrowth which, arising just below the tij^, extends 

 upward beyond the apex over which it is slightly recurved (or more 

 rarely curved away from the tip), ending in a bluntly pointed ex- 

 tremity. Spores 4G X 4 (i. Perithecia 75-90 X 20-25 ^, the outgrowth 

 35-45 X 14/;i. The longer ap])endage8 75 /i. Receptacle 35-45 /x. 

 Total length to tip of perithecium 110-125 /x. 



On Conosoma pnbescens Payk. Growing appressed on the bristles 

 which cover the abdomen near its tip., Waverly, Mass. Au anomalous 

 form placed only provisionally in the present genus. 



