Studies in Entomogenous Fungi. T. Petch. 115 
Corallomyces, Char. emend. Perithecia of Nectria; conidial 
stage stilboid; conidia continuous. 
Sphaerostilbe, Char. emend. Perithecia of Nectria; conidial 
stage Microcera; conidia elongated, septate. 
In re-describing Microcera coccophila, the Tulasnes stated that 
Microcera differed little from Atractium Link. Link established 
the genus Atractium in Magazin Gesellsch. Naturforsch. Freunde 
zu Berlin, Jahrg. m1, 1809, p. 10, the type species being 
Atractium Stilbaster, and the generic characters, ‘‘Stroma elon- 
gatum, capitatum. Sporidia fusiformia, non septata, capitulo 
instrata.’’ Link’s figure shows a Stilbum with minute oval 
conidia; his type species is listed in Saccardo as Atractium 
gelatinosum (Pers.) Sacc. Subsequently (bid. vir, p. 32) Link 
included in his genus Atractium ciliatum (Tubercularia ciliata 
Alb. and Schw.), with the note that he had seen septate conidia 
in this plant; the latter now stands as Volutella ciliata. Hence 
Link tacitly extended his genus to include species with septate 
spores, and in this he was followed by Berkeley and Saccardo, 
who published an amended generic description in Michelia, 11, 
p. 32, citing Atractium Therryanum Sacc. as their type species. 
The genus Atractitum would appear to require revision, but 
that is not relevant to the present discussion. The Tulasnes’ 
statement is probably to be explained on the supposition that 
their knowledge of Atractium was based on the specimens sent 
to them by Berkeley as Atractium flammeum Berk. and Rav., 
since the latter species is identical with Microcera coccophila 
Desm. ; 
Sphaerostilbe fammea Tul. 
This species was described by the Tulasnes in 1856 as Stilbum 
flammeum, the name being changed to Sphaerostilbe flammea in 
1861. Its conidial stage had been described by Berkeley in 
1854 as Atractium flammeum Berk. and Rav. That Sphaerostilbe 
jflammea is parasitic on scale insects appears to have escaped 
notice hitherto, though that is the case with all the specimens 
enumerated below. When its real host has been observed, the 
perithecial stage has been re-named, or the conidial stage has 
been correctly referred to Microcera coccophila Desm. (1848), 
which is identical with Atractium flammeum Berk. and Rav. 
(1854). 
The fungus forms a white or pinkish tomentose or byssoid 
stroma, extending from or over the scale in many cases, but 
this is sometimes lacking. The synnemata (Plate III, fig. 8), in 
the North American and European forms, are usually small, 
either clavate, up to 0-6 mm. high and 0-25 mm. diameter, or 
conical, 0-5 mm. high, 0-25 mm. diameter, or, more generally, 
flattened pulvinate, up to 0-75 mm. long, 0-5 mm. broad. But 
8—2 
