SCHIZOSACCHAROMYCES CHERMETIS ABIETIS 205 



but more at 37. No scum is formed. It ferments dextrine, dextrose, 

 d-mannose, d-galactose, d-fructose, saccharose, maltose and raffinose. 



SCHIZOSACCHAROMYCES CHERMETIS ABIETIS. Sulc 



This yeast was found in Chermes abietis and resembles Sch. Pombe 

 very much. The cells are oval. They were not cultivated by Sulc. 

 In the larvae of Psylla Foersteri he found Sch. Aphidis; Sch. Psyllae 

 Foersteri was found in the larvae of various homoptera. He also ob- 

 served in certain of the 

 homoptera, fungi resem- ifj A 



bling the Schizosaccharo- B \ 



myces in which multipli- " ^ 



cation was accomplished l 2 



by division or budding 

 and which did not form 4 



ascospores. The author Fig. 81. Sch. Chermetis strobilobii (1 to 4) and 

 gave them the generic Sch ' Chermeiis abietis ( 5 and 6 ) (after Sulc). 

 name of Cicadomyces. These are distinguished from the Schizosac- 

 charomyces by the fact that their division remained for a long time 

 incomplete; the cells remain united at their apexes and are able to 

 form chains of cells. The author describes C. Ptyeli lineati and the 

 C. Aphalarae calthae. 



Hollande l has observed the yeast forms in the blood of other 

 insects. He studied the blood of the locust (Caloptenus italicus). 

 Under normal conditions, the blood of this insect is yellow, but when 

 it is infected with the yeast it is a milky white. Hollande could re- 

 produce the infection only by injecting blood from an infected insect 

 into a healthy insect. These insects died i from 5 to 7 days and 

 their blood was found to be fired wit the yeast parasite. 



The yeast structures were cylindrical. Their dimensions varied 

 from 4.98 to 6.64 microns in length and from 1.70 to 2 microns in 

 width. A vacuole is present in each end of the cell. Buds may 

 appear at the end. After staining with ferric hematoxyline a cir- 

 cular nucleus is observed which is rich in chromatin. This parasite 

 grows well on blood serum with a white scum; on gelatin, growth 

 is abundant. Fine filamentous structures may be seen at the edge of 

 the cells. No spores could be demonstrated. 



SECOND GROUP 



Yeasts multiplying by budding, and in which the ascs are derived 

 from a copulation, or show traces of sexuality in their origin. 



1 Hollande, A. Ch. Formes levures pathogenes observee dans le sang d'Acri- 

 dium (Caloptenus italicus). Comp. Rend. Acad. Sci. 168 (1919), 1341-1344. 



