NEW LABOULBENIALES. 719 



cells sometimes abruptly darker and very slightly inflated; the 

 perithecium tapering thence to the symmetrically rounded, long, nar- 

 row, finger-like termination of the apex; which is abruptly distin- 

 guished by a large nearly black, externally slightly convex area, which 

 subtends it on the inner side, and by an umbonate black elevation, 

 which subtends it externally and contrasts strongly with a pale area 

 immediately below it. Spores 52X4/i. Perithecia 90-110 X 16- 

 20 M- Receptacle 88-15 X 18 m- Appendage to tips of longest 

 branches 105 n. Total length to tip of perithecium 200-230 fx. 



Near the base of the left wings of Sapromyza muscaria Lev. No. 

 1629, Los Amates, Guatemala (Kellerman). 



Although this species is nearly allied to L. Sapromyzae, it is at once 

 distinguished by the finger-like apex of its characteristically curved 

 perithecium. Like the last mentioned species, it belongs to the sec- 

 tion of the genus formerly distinguished as Ceraiomyces, its receptacle 

 also corresponding to the type of Spegazzini's ' Laboubeniella' . The 

 infested host was found among a small lot of flies collected for me by 

 the late Professor Kellerman. 



Laboulbenia crispata nov. sp. 



Slender, straight, or somewhat curved. Basal cell of the receptacle 

 nearly hyaline, slender, subclavate, obliquely and asymmetrically 

 adjusted to the much shorter olivaceous subbasal cell, which is distally 

 very obliquely related to the stalk cell of the perithecium (cell VI) 

 and less so to cell III-IV, which is similar or slightly larger, externally 

 convex, bulging but slightly below the broad insertion, and more 

 than twice as long as the narrow, but clearly defined cell V, both cells 

 pale olivaceous. Insertion-cell broad, flat, almost opaque: basal 

 cell of the inner appendage dark brown, small, bearing branches right 

 and left; their basal cells brown, the rest hyaline with dark septa: 

 axis of the outer appendage opaque, bearing usually three branches 

 externally and one terminally, each of the latter bearing a pair of 

 branchlets terminally from their basak cells; the branchlets lying in a 

 radial plane, deep brown, nearly uniform throughout, very long, 

 slender, subparallel, curved inward across or over the perithecium, 

 extending free far beyond it, their extremities, especially those of the 

 outer, strongly recurved inward. Perithecium somewhat darker oli- 

 vaceous, usually strongly curved across the base of the appendage, 

 somewhat, inflated, the limits of the wall-cells, which describe some- 



