THAXTKK. — ARGENTINE LABOULBENIALES. 185 



tlu'ir cavities obliterated by their thickened walls, the outer branches 

 short, directed outward and upward, the inner (from the sul)basal 

 cell) stouter, longer, once or twice branched near the base and ex- 

 tending not nuich beyond the middle of the perithecium. Peri- 

 thecium ()o-75: ascigerous portion 55-70; the stalk-cell 28X12m- 

 Receptacle 20X16/X. Total length of appendage including branch- 

 lets 00-80 /i. Total length to tip of perithecium 95-120 m- Spores 



18 X 2 M- ''' 



On superior abdomen of Scopncus f rater Lyach. No. 1698 and No. 



1702, Palermo. 



A small pale species chiefly peculiar from the fact that no foot is 

 distinguished from the peculiar rocker-like basal cell of the receptacle, 

 which is usually quite hyaline. The species bears more resemblance 

 to the Stilicus-inhabiting forms than to the more typical members 

 of the genus. 



^^'■ 



Corethromyces brunneolus nov. sp. 



Perithecium pale reddish brown with a yellowish tinge, usually 

 rather strongly bent inward distally; the basal cells very small not 

 distinguishetl from the base of the ascigerous portion, which tapers 

 but slightly to the blunt rounded hyaline apex; the tip not distin- 

 guished; the small basal cell-region clearly distinguished by a distinct 

 constriction from the stalk-cell, which may be nearly straight, or 

 strongly curved, distally broader or slightly inflated, about twice as 

 long as broad; the stalk-cell and the appendage very asymmetrical 

 in their relation to one another and to the small receptacle; which 

 consists of two subequal cells, concolorous with the perithecium. Basal 

 cell of the appendage relatively large, symmetrically inflated; the 

 subbasal cell, at maturity and through displacement, appearing to 

 bear directly a more or less fan-like series of short, rather stout, some- 

 what incurved hyaline branches, which may be once or twice branched 

 near the base. Spores 22X2.5 /x- Perithecia 58-62X20 m; asci- 

 gerous portion 54-58//; the stalk-cell 23-30X12^- Receptacle 

 24X 16 /i including foot. Appendage, total length including branches, 

 longer, 100 m; the basal cell 20X16 m- 



On the elytra of Stilicus sp., Nos. 1511 and 2012, Temperley. 



This pale species appears to be very rare, only a very few specimens 

 having been obtained. It is quite unlike any of the other forms 

 which occur on Stiliciis and appears to be most nearly allied to the 

 preceding species. 



