MOXOGRAril OF THE LAIJOUTnENTACE-E. 331 
A very well marked and in the case of well developed specimens one of the most strikiiu 
r 
to 
species of llic genus, easily recognized by tliu crcst-likc scries of branches from the oufor 
appendage, which, however, varies very considerably. Tlie specimens from ilt^xico and EiirojK^ 
ilUistrate the extremes of development as far as the appendages arc conccrucJ, fig. 29 rq>reso)it- 
ing a specimen from the first mentioned locality. The s])ocics is ratlicr common in i\vy or moist 
situations, the hosts being abundant in rubbish in cultivated lami. It is doiib(l<'ss this form 
which is mentioned by liouget as occurring on Padcn/.s In France and confuf^cd by him \vi(h 
L. Rougetii. It is a distinctly isolated form, and cannot be said to be definitely related to any 
of the known si)ccies of the genus except the following, although an nndescribed form occurs on 
BIcdius, which approaches it in some respects. 
LAnouLDEXiA DiorsTs nov. sp. Plate III, fig. 6. 
Perithecium dull amber brown, a blackish patch below the hyaline lip margins on tho inner 
side, the inner edge rather straight, the apex large, prominent and somewhat abruptly dis- 
tinguished, the insertion of the trichogync usually conspicuous. Receptacle often very lung- 
stalked through the great elongation of cell 11; the distal portiuu small, compaci, ratlier 
abruptly distinguished from cell 11, its cells more or less uniform in size; the whoh^ tingid with 
brown, the distal part more deeply- Appendages arising from an inner and an outer cell, the 
inner usually producing two short two- to three-celled branches bearing the long, slender nnthe- 
ridia; the outer followed by three cells: the lower producing from their inner side one, rarely 
two, superposed branches, the upper a crest-like series of branches arranged antcro-posteriorly in 
a single row. All the branches more or less decj)ly tinged Avith brown, somewhat constricted at 
the septa, rarely furcate above the basal cell, often tending to grow stouter distally, the terminal 
cell of each bluntly rounded or tapering but slightly. Spores, about 1 x 55 fi. Perithccia, 
110-140x30-38/1. Receptacle: distal portion about 85x50/i. Cell II, 200-500 x 25 /i. 
Total length to tip of perithecium, 300-800 /i. 
On Diopsis tlioracica Westw., Coffee Ilill, Liberia, Africa (0. F. Cook). 
Tliis curious form, which was first observed on its singular host by Professor Cook, is the 
first species of the genus which has been found on a dipterous insect, in the present instance a 
fly with stalked eyes, and, according to Professor Cook, with riparian habits. It seems in gen- 
eral to be subject to little variation except in the length of cell IT, which may be greatly elon- 
gated. In the general form of its perithecium and receptacle it recalls to some extent L. miter- 
ranea ; but it is undoubtedly more closely related to L. crlstata than to any other sficcies, as is 
indicated by the form of its appendages and antheridia. as well as by the outline of its perithe- 
cium. Tlic types were found on the legs and abdomen as well as on the eye stalks of the host 
on which, from their length and dark color, they are quite conspicuous. 
Laboulbenia Brachini Tliaxter. Plate XX, figs. 1-8. 
Troc. Am. Acad. Arts and Sci. Vol. XXVII, p. 40. 
Amber yellow, becoming more or less suffused with amber brown» Perithecium rather 
small and stout, somewhat inflated, the apex deep black, largCj bluntly rounded. Appendages 
