EXTRA-AMERICAN LABOULBENIALES. 731 



row base of the ascigerous cavity; the inner somewhat hirger than 

 the primary stalk-cell, to the upper half of which it is somewhat 

 obliquely united; the outer larger, lying wholly above the secondary 

 stalk-cell; which is somewhat smaller, externally convex; the stalk- 

 and basal cells forming an erect or slightly di\-ergent stalk-region, 

 narrower below and distally broader than the venter of the peri- 

 thecium. Venter yellowish brown, nearly symmetrical, subellipti- 

 cal, thick-walled, erect, or slightly tilted inward; the neck broad, not 

 abruptly distinguished, longer than the venter, tapering but slightly; 

 the short tip sometimes slightly inflated, and distinguished by an 

 inconspicuous external depression; the apex subtruncate, abruptly 

 compressed below the hyaline, somewhat irregularly prominent, small, 

 papillate lips. Spores 25X3.0^. Perithecia 110-125 X 35-12 m- 

 Receptacle 100-130 X lS-22 m- Appendage 50-60 fx. Total length 

 225-300 M. 



On the posterior legs of Limosina punctipennis Wied. No. 2133 and 

 2130, Sarawak, Borneo. 



This species is more nearly related to S. Papuanus, from which it 

 is at once distinguished by its short stout neck and broad blunt 

 termination. What appears to be a variety of the same form was 

 also obtained from the same locality (Xo. 2185) on the abdomen of a 

 minute species of Limosina, several infested specimens of which have 

 been examined. This variety is much smaller, measuring from 150- 

 175 m; the spores about 18 X 2.5 m- The stalk- and basal cells of 

 the perithecium are hardly longer than broad and the latter do not 

 appreciably overlap the ascigerous cavity. The lips of the peri- 

 thecium are not so clearly defined, but there seem to be no well defined 

 characters by which it could be specifically separated. In almost 

 every specimen of the type-form a spore is protruding from the pore, 

 and, diverging slightly, might well be taken for a spinous process. 



Stigmatomyces Papuanus Thaxter. 



This species has been found on numerous flies from Kamerun, 

 belonging to the Borboridae, under the following numbers: 2291, 

 2292, 2640, 2670, 2672, 2673, 2675, 2736, 2737, 2739, 2740 and 2741. 

 Its variability is considerable, but is usually associated with differ- 

 ences in the size of the perithecia, which may be due in part to varia- 

 tions in the hosts and in part to differences in the position of growth. 

 The total length of fully matured individuals may vary from 175 /i 



