206 BOTANICAL GAZETTE [MARCH 
LITERATURE CITED. 
BREFELD, O., "70, Entwicklungsgeschichte der Empusa muscae und E. radicans. 
Bot. Zeit. 28; 161-166, 177-186 
, 71, Untersuchungen iiber die Entwicklung der Empusa muscae und E. 
radicans. Abhandl. naturf. Gesells: Halle 12: rf. pls. 4. 
» > pas die Entomophthoreen und ihre Verwandten. Bot. Zeit. 35: 
345-355, 368- 
—— a En hes radicans. Untersuch. tiber Schimmelpilze 4:97- 
Tit. 
-7- 
oe Conidiobolus ae und minor. Untersuch. tiber Schimmel- 
niin 6:35-72. pls. 3 
Cavara, F., ’99, Osservazioni a sulle certo thchone: Nuovo Giorn. 
Bot. Ital. N. S. 6: 411-466. pls. 
Coun, F., ’55, Empusa muscae in ae Krankheit der eset Nova 
Acta head: Caes. Leop. Carol. Germ. Nat. Cur. 25:3 
Lesert, S., ’56, Die Pilzkrankheit der Fivesen. Abhandl. Naturf. Gesells. 
Zuri 
THAXTER, R., ’88, The Entomophthoreae of the United States. Mem. Boston 
. Nat. Hist. 4:133-201. pls. 14-21. 
VurtLemtn, P., :00, Développement des azygospores d’Entomophthora. Compt. 
Rend. Acad. Sci. Paris 130: 522-524. 
EXPLANATION OF PLATES XIV AND XV. 
The drawings were made with the aid of an Abbé camera-lucida, and for the 
most part with various compensating oculars combined with Zeiss 2™™ apochro- 
matic obj. N. A. 1.30. 
PLATE XIV. 
1Gs. 1-9, Empusa sciarae. 
Fic. 1. A freshly killed pie fixed and stained with acetic methyl green. 
% 275. 
Fic. 2. Section of a younger filament. 
Fic. 3. Section of a still younger vegetative hypha. 275. 
Fic. 4. A germinating conidium, cultivated in a decoction of cooked larve, 
oe a Ain conidium. Killed in acetic methyl green. X575. 
IGS. 5, 6. Conidia with still younger germ-tubes. Killed with acetic methyl 
ok *575- 
Fic. 7. A germ-tube has formed a secondary conidium, which in turn has 
started to form a tertiary conidium. Killed ditto. 575. 
Fics. 8, 9. The conidia have produced long germ-tubes instead of secondary 
conidia. From the same culture as those above. Killed ditto 
Fics. to-11, Empusa aphidis 
Fic. to. A cross-section of one of the sucker-like rhizoidal disks. 
Fic. 11. A section of a single rhizoid. x 1080. 
