1903. No. 11. MYKOLOGISKE UNDERS. OVER SOP PAA FURUSP. LARVE. II 
The only real successful work of this kind done in America upon 
a considerable scale has been upon grasshoppers (Acrididae). The United 
States Department of Agriculture has this work in hand and I forward 
your letter to Secretary James Wilson at Washington D. C. 
Trusting that you may get some aid in this way, I am, 
Vours very truly 
T. J. Burrill, 
Botanist. 
The University of Kansas, Lawrence. 
Jan. 31th 1902. 
Dr. Johan-Olsen. 
My dear Sir. 
Yours of ııth ult. was duly received. I take pleasure in forwarding 
to your address a package containing the six (6) annual reports of Experi- 
mental Station for the extermination of the Chinch-bug. I have not at 
present any Sporotrichum globuliferum or other fungus on hand, I have 
been absent for more than a year past and have not been able to carry 
on my work. The Chinch-bug has been in the past 10 years so 
thoroughly destroyed by the artificial introduction of the Sporotrichum 
from my laboratory, that now for three or four years there has been 
little or no damage inflicted on our crops by that pest. 
Yours sincerely 
Ibe Jal; Snowach ID) Ju. Il. DE 
Director of the Museum. 
Den, der altsaa har arbeidet længst og mest udholdende med sagen, 
er ogsaa den, der har opnaaet de bedste resultater, nemlig professor Snow. 
Han har hvert aar udgivet en større beretning om forsøgene, af hvilke 
jeg kun skal anføre slutningsresuméet af den 6te og sidste beretning: 
Final Summary. 
Results of Experiments for ten years 1888—1897. 
1. Chinch-bugs in any of their stages of development scarcely run 
slightest risk of death on account of heavy rains, even when these are of 
long duration. They are inconsiderably affected by extremes of heat 
and cold, 
Note, — When Chinch-bugs cross en masse a hot, dusty road-bed, the many that 
die are killed by the particles of dust that enter their spiracles rather than by the heat. 
