OF ARTS AND SCIENCES. 171 



those observed upon the smaller species. The form belongs to the 

 group of which L. Galeritce may be takeu as the type, in which the 

 base of the cylindrical thick-walled perithecium tends to become elon- 

 gated to form a neck-like insertion. The host affected is one of the 

 myrmecophilous Carabidse inhabiting ants' nests. 



Laboulbbina australiensis, nov. sp. 



Perithecia as in the preceding species, less deeply suffused and sup- 

 ported in older individuals by a more or less neck-like base. Appen- 

 dages consisting of two closely united basal cells; the outer much the 

 largest, and giving rise directly to two branches, the outer deeply suf- 

 fused with olive-brown, the inner once or twice branched, h valine or 

 with suffused tips. The inner basal cell gives rise to one or two 

 branches, simple or once or twice branched : the insertion cell black, 

 thick and rather narrow, placed opposite the base of the perithecium. 

 Receptacle normal, except for the eventually neck-like hyaline base of 

 the perithecium, hyaline becoming suffused with olive-brown, especially 

 in the region of cells (2), (3), and (6). Spores 74 x 5.5 p. Perithe- 

 cia 110-148 X 38 p. Longest appendages 222 /z. Total length to 

 tip of perithecium 220-300 p. 



On elytra of Acrogenys hirsuta McLeay, Australia. 



Closely allied to L. Panagcei, from which it is distinguished by 

 its appendages, which are longer, the outer branch blackened and the 

 basal joints not inflated. 



Laboulbenia mexicana, nov. sp. 



Pale amber-colored, the basal cell and mature perithecium more 

 deeply suffused. . Perithecia large, straight, thick-walled, the black 

 hyaline-lipped apex abruptly distinguished, nearly symmetrical. Ap- 

 pendages hardly exceeding the perithecium, consisting of two basal 

 cells, the outer giving rise to two branches, an outer usually simple, 

 more deeply suffused, and an inner larger, once or twice branched. 

 From the inner basal cell arise two branches on either Bide, once or 

 twice successively branched, and bearing a few single antheridia later- 

 ally. Receptacle elongate, often abnormally septate, the basal cells of 

 the perithecium extending upwards about the ascogenous ana and 

 forming a broad more than usually elongate base. Spores 90-100 X 

 7 ft, Perithecia 200-240 X 65 p. Appendages, longest, 220 p. 

 Total length to tip of perithecium 500—600 p. 



On elytra of Gralerita mexicana Chaud., G. nigra Chev., G. (Efjin- 

 noctialis Chaud., Mexico and Nicaragua. 



