Geology and Natural History. 69 
short-horns—in other words, where from any cause thoroughbred 
short-horns huve degenerated iuto animals of any other breed or 
type ? 
other breeds so changing or “reve 
3d. Have you ever heard of such a thing taking place in the ex- 
perience of other breeders, so well authenticated that you believed 
it to be a fact ? 
Now please let me explain why I trespass on your time and 
good ‘ia with questions that may seem to you to be simply 
absurd. 
I think that the practical breeders of thoroughbred stock (of 
whatever kind) commonly believe that so long as the breed is 
kept pure and no other blood mingled, that although the animals 
may vary greatly in excellence, all of them will have the essential 
characters which distinguish that breed from all other breeds or 
2d. Do you personally know of thoroughbred animals of any 
verting ?” 
but, moreover, that the animals will become of some other breed 
or type which is said to be that of the early and cruder ancestors 
from which the breed originally sprung, however long ago that 
ma * * * * * * 
18. Seventh Annual Report on th ious, Beneficial, and 
other Insects of the State of Missouri, made to the State Board of 
griculture ; by Caartes V. Rit ate Entom st.—This is 
tum Dunal, of the Rocky Mountains, but had in 1859 reached a 
ree i a; in 1861 invaded Iowa an 
Southwest Wisconsin; in 1864, 1865 crossed the Mississippi to 
estern Illinois; in 1866 occupied the region west of a line from 
Chicago to St. Louis; in 1867 reached Southwest Michigan and 
