THAXTER. — ARGENTINE LABOULBENIALES. 1G9 



by two rounded tooth-like prominences from two adjacent wall-cells 

 of the terminal tier. Spores, in perithecium, male 28-30X4-5 /u, 

 female about 40 ^i. Perithecia 200 23") X 50-05 ^, the subterminal 

 prominence 8 /i long, the stalk-cell 00X20 ju. Sterile appendage-cell 

 20X 12 fi. Total length to tip of perithecium 250-280 fx. 



Near the tip on the superior surface of the abdomen of Brachida 

 Reyi Slip., Llavallol, No. 1989. 



Although in fully matured turgescent individuals the distinction 

 between the basal cell and basal wall-cell regions becomes obliterated, 

 the basal cells, especially the external one, may be distinctly promi- 

 nent in younger or partly collapsed individuals. The ascogenic cell 

 produces great quantities of asci and spores, unlike the forms of 

 Dioicomyces. The general form of the perithecium recalls that of the 

 conventional "fat pig." The host has been determined for me by 

 Dr. Fenyes. 



Dioicomyces Formicellae nov. sp. 



Male individual rather slender, the foot-cell slightly broadened, 

 blackish or concolorous with the basal cell of the receptacle which is 

 grey brown and usually separated from it by a hyaline line; basal 

 cell a little more than twice as long as broad; the subbasal usually 

 nearly square; the third cell shorter; the antheridial cell somewhat 

 longer than broad; the neck terminal at one side, slender slightly 

 bent. Total length including foot and neck 60-70 /u; basal cell 20 X 



8 M. 



Female individual variously curved, sometimes sigmoid, sometimes 

 curved throughout, or the perithecium alone somewhat bent. Basal 

 cell of the receptacle hardly longer than the foot, suffused with brown, 

 the subbasal cell almost obsolete; the sterile appendage-cell short, 

 rounded distally, tinged with brown. Perithecium large, yellowish 

 brown, deeper at the tip and in the middle, strongly curved; the 

 successive wall-cells on the convex side distinguished by slight eleva- 

 tions and depressions, the third wall-cell on the concave side slightly 

 elevated; the venter somewhat inflated; tapering slightly to the 

 coarse bluntly rounded or roughly truncate apex; the basal cell 

 region sometimes abruptly narrower or not distinguished; the stalk- 

 cell elongate, narrower at its base, tinged with yellowish or brownish. 

 Spores, male 35X5 fi, female 40-42X8 m- Perithecia 145-165X45- 

 50 fi; stalk-cell 140-180X25 /x- Receptacle, including foot and 

 appendage-cell, 40-65 ju. 



On the elytra of Formicella strangulata Pic, Palermo, Llavallol, 

 and Temperley, No. 1692. 



