6 
: ' bulletin 94 . 
Mr. Conrad Schaffer,' 411 extensive and intelligent farmer liv¬ 
ing at Deuel, Colorado, decided to try the Criddle mixture and in¬ 
duced several of his neighbors to join with him and make a thor¬ 
ough test. In a verbal report to the writer on October 20, Mr. 
Schaffer said the mixture did but little good. He said he had 
much better results with a mixture of bran and Paris green that 
was moistened with just l enough refuse syrup from a beet sugar 
factory to make the mixture adhere in small balls. These balls 
of poisoned bran were distributed about 20 feet apart along potato 
rows and in other places where the grasshoppers were abundant. 
CUTWORMS. 
The Army Cutworm (Chorizagrotis auxilaris .*) 
[PI. I. Fig. A. B. C. D.] 
which is usually as numerous as all other species put together in 
northern Colorado, occured in more than its usual abundance last 
spring. The moths have a strong propensity for getting into 
buildings whether there are lights inside or not. It is a common 
thing for these moths to appear in large numbers upon the insides 
of windows during May and June. The moths also conceal them¬ 
selves among the leaves of trees during the day time. The abun¬ 
dance of the moths was especially remarkable during the summer 
of 1902 and many inquiries were received at the Station concern¬ 
ing them. A stick or a stone thrown into a tree when they were 
most numerous would often cause hundreds to fly out for a few 
seconds then thev would return. They were such an annovance 
about lamps in houses that the occupants of the home would blow 
out the lights and go to bed just to get away from the nuisance. 
So that the unusual cutworm invasion of the past spring was 
only the sequel of the abundance of moths the preceding summer. 
This is the species treated by Dr. Wilcox in Bulletin 17 of 
the Montana Experiment Station. It is a native of the Rocky 
Mountain region. I have found the moths not uncommon in this 
State,near to timber-line under the loose bark of stumps. 
Specimens of the spring brood of moths have been taken at the 
Station between April 16 and July 10,and are usually most abund¬ 
ant about the first of June. The fall brood has been taken from 
September 13 to October 12. A queer circumstance in connection 
with my studies of this moth is, I have never been able to find 
fully developed ova in the females of the first brood though hun¬ 
dreds have been dissected and examined. In the great majority of 
cases there has been no indication, of ova in any stage of develop- 
___ • \ • • « • i 
* Chorizagrotis auxilaris having ; priarity, X have included with it forms commonly de¬ 
termined as introfevens and agrestis because in a larger series there seems to be every 
gradation between the three fbrpis aud because they always occur together and rise 
and fall together in numbers so far as my experience has gone. The specimens in the 
collection were determined by ;Ur. J. B. Smith; also by Mr. Otto, Heidemann through 
the courtesy of Dr. L. O. Howard. 
