174 
me that the fungus of the green mnseardine approaches in every re¬ 
spect the genus Isaria , the name Metarhizium became useless, the more 
so because the other representatives of this genus were imperfectly 
established. The fungus of the green mnseardine has, besides, the 
typical aspect of an arborescent Isarici upon the larvae of Cleonus punc- 
tiventris when placed in moist sand. In artificial cultures Isaria de¬ 
structor is kuown besides under the form Coremium. 
The ingenious names which Lebert lias given to different forms of 
eutomogenous fungi, such as VerticiUium , Polistophthora , Acanthomyces , 
etc., by no means represent new forms but are only synonyms for 
Cordyceps and Isaria. 
It remains to be seen in how many cases museardine parasites of insects 
can develop under artificial conditions. It is said that experiments were 
made upon twenty-four different species of insects and always gave favor¬ 
able results. Besides these, there were four other cases of contagion, 
which, although observed under artificial conditions (notin open air), did 
not arise from spores sown intentionally. 
In these latter cases the parasite developed upon insects inclosed in 
bottles or boxes. It i- interesting to note that in almost every case 
artificial infections are due to fungi of the genera Isaria and Botrytis; 
that is to say, to fungi whose artificial cultures succeed marvelously. 
On the contrary, infections with the genera Cordyceps and Entomopli- 
tliora are more restricted in number. Up to the present time artificial 
cultures of these genera have not succeeded at all. For the genus 
Cordyceps we have but one experiment by De Bary and for Entomopli- 
thora three experiments by Brefeld. No experiments have been at¬ 
tempted with Stilbum , but judging from the structure of the fungus, 
so like that of Isaria , it appears probable that artificial cultures and 
infections will succeed as well with it as with Isaria. With Tarichium 
all attempts of contagion have failed completely, and consequently arti¬ 
ficial culture is shown to be impossible. 
If later researches confirm the cycle of development of Tarichium 
uvella , and if the complete development of other representatives of this 
genus can be obtained in artificial cultures, it will then be possible to 
attempt infection with spores artificially produced. As has been in¬ 
dicated, the ordinary spores of Tarichium will never produce contagion 
when placed in contact with the bodies of insects.— Effie A. South- 
worth. 
Hartig, Dr. Bobert. Lehrbuch der Baumkrankheiten. Zweite verbes- 
serte und vermehrte Aufiage. Mit 137 Text-Abbildungen nndeiner 
Tafel in Farbeudruck. Berlin. Verlag von Julius Springer, 1889. 
8vo, cloth, pp. 291. 
The second edition of Dr. Hartig’s Lehrbuch embodies much interest¬ 
ing information in a convenient form and can not fail to meet with the 
same favorable reception as the first edition published in 1882. 
