1898 ] THE DEVELOPMENT OF SOME ANTHRACNOSES 95 
On the stems the mycelium is scarcely apparent, but with a hand 
lens it may be seen to form a very sparse growth of short threads 
spreading out on the inner surface of the tube.. The stems bear 
blackened elevations which resemble perithecia in shape, but 
which have never been found to be associated with conidia. 
The conidia do not form large pustules on the stem, but can 
barely be distinguished as small light colored elevations. The 
surface of the infusion becomes coated with a light colored 
scanty growth of mycelium. Within this growth appear light 
colored elevations composed of aggregations of swollen cells 
which develop dark membranous enveloping walls, similar in 
appearance to the dark elevations on the stems. 
While it is possible that the species Colletotrichum lagenarium 
infests the citron, the species in question is distinct from the 
one studied on the watermelon. There seems to be no species 
described in the genus Volutella which agrees with the one 
under discussion, and the name Volutella citrulli is proposed with 
the following description: 
Acervuli elevated ; basidia elongated, seated upon an abun- 
dant stroma rising above the tissue of the host. Conidia hyaline, 
single-celled, elliptical or clavate, sometimes slightly curved, 
15-20 3-4. Seta, when present, marginal, septate, with a 
Swollen base. Forming light brown, subcircular, confluent - 
patches on the rinds of citron ( Citrullus vulgaris, var.). 
CoLLETorRICHUM LYCOPERSICI Chester ( fig. 21). 
Another anthracnose of the tomato is described by Chester” 
as follows: « Spots depressed, circular, slightly discolored, 
center black, 5-10" in diameter, becoming confluent. Acer- 
vuli abundant, densely gregarious, rusty brown or black, applan- 
ate, 95-150 in diameter. Sete abundant, fuliginous, generally 
curved, rarely undulate or straight, gradually tapering, septate, 
65-110, about sm at the base. Conidia oblong 16-22 4x, 
averaging 18—20x 4p, hyaline, 2-3 guttulate. Basidia short, 
slender, 30-40p, arising from a well developed basal stroma.”’ 
“Del. Agr. Exp. Sta. Rep. 4: 60-62. 1891. 
