11L 
condition of this lot was regarded as unsatisfactory, and every¬ 
thing was again transferred to a clean box. Of those which were 
dead a few were covered with muscardine fungus, but at least a 
hundred times as many gave no external trace of muscardine. 
Five additional lots from various places w T ere now introduced, and 
the box was a second time infected, by means of fifty chinch- 
bugs covered with ripened Sporotrichum collected by Mr. Marten 
in whfat fields at Tonti and Farina June 6 and 7 (see No. 55). 
June 15 thirteen lots more were placed in this box, and a quan¬ 
tity of fungus-covered dead were removed and dietiibuted in spring 
wheat on the University experimental faim (see No. 61). June 
16 a quantity was taken out for shipment, and seventeen packages 
from farmers were introduced. June 17 six lots more were placed 
in this box, and June 18 four more. On this last date both old 
and young were dying with white muscardine, and a few with 
Entomophthora. About three thousand live bugs from this box 
were now distributed in spring wheat on the University farm (see 
No. 62), and a lot of dead bugs removed and prepared for ship¬ 
ment, together with a quantity of both dead and living for use 
in fields in southern Illinois (see No. 63). June 20, box over¬ 
hauled, dead bugs removed and distributed to farmers. June 22, 
•emough material removed to supply fifty-one farmers, after which 
the entire consents were transferred to two large boxes in Natural 
History Hall (see Nos. 68 and 69). 
No. 55. June 7. A field infection experiment, started by Mr. 
Marten in a 4acre wheat field on the Wells farm, represented 
at A, Plate I. Chinch-bugs abundant, literally covering the wheat 
in many places, especially in the northeast corner adjoining 
corn (D). A dozen bugs dead with the white fungus, collected 
from the ground in wheat at this time, were afterwards placed in 
No. 54. Diseased insects locally present in all fields examined. 
About one hundred fungus-covered chinch-bugs from No. 54 dis¬ 
tributed along the second and third drill rows, at the bases of 
plants where live bugs were most numerous, for a distance of sev¬ 
eral rods on the north and east sides, in the northeast corner 
(indicated by the heavy dotted lines on Plate I). ‘ PTi 
June 19, field examined by Mr. Marten. Fungus-covered bugs 
about as abundant throughout the wheat as on the former visit. 
No indication that the disease had spread, or was any more 
prevalent in the vicinity of the spot where the dead bugs were 
distributed than at other places. Many fields examined in this 
neighborhood not entered on former visit. Diseased bugs found 
in all in moderate numbers. A second lot of infection material, 
consisting of several hundred bugs dead with this fungus, from 
No. 54, scattered on the ground in several drill rows in the imme¬ 
diate vicinity of those previously distributed. Wheat badly dam¬ 
age! and considerably lo Iged in several places. Bugs everywhere 
abundant, advancing into corn (B and D). June 20 Mr. Marten 
revisited tlm field (A) to examine two spots (a and 6), each 
about one rod in diameter, where manure had been piled previous 
t) being scattered, and where the wheat was badly lodged. The 
