SCEEENINGS. 
29 
of insect-presence, being sold at very low rates, in some cases as feed 
corn for horses, sometimes as poultry-food. The samples showed me 
were what is termed alive with insects. 
With regard to importation of Hessian Fly attack in chrysalis 
form, in this manner it appears unlikely, as Hessian Fly is not known 
Calandea granaria; C. oryz^. 
6, 7, Granary Weevil; 2, 3, pupa, nat. size and mag.; 8, 9, Eice Weevil, nat, size 
and mag.; 1, corn, showing puncture of entrance and hole of exit of weevil; 
4, infested maize-grain. 
to attack oats, and, in the case of barley and wheat, the chrysalids 
would not be at all likely to be found in fairly cleaned grain. Investi¬ 
gation has shown that the chrysalids may be found in the dust and 
rubbish beneath the machine, but not, so far as we see at present, in 
the chaff or the cleaned corn. 
But quite independently of Hessian Fly, the increased amount of 
spread of all the pests, insect or fungoid, which may be in these 
screenings, is a matter calling for consideration, and all the more 
because—though each sufferer sees what is going forward—there 
is a strong and natural objection to give information which may 
cause business annoyance ; and it is most difficult to procure full 
details. 
On application to the manager of a large steam mill, where 
imported wheat is ground, he obliged me with a series of samples 
showing the different kinds of refuse now sold cheap, mostly for 
poultry-food. These samples were of four kinds, known as “rubble,” 
which consists of bodies larger than the wheat-grains, as lumps of 
earth, maize, beans, &c. ; first and second screenings, which consist 
of broken corn, bits of straw, chaff, &c., and other bodies smaller 
than the wheat-grains, or which may (like straw) pass by reason of 
their fineness through the screens ; and, fourthly, there was “ black 
dust,” which is literally, for the most part, mere dust driven by a blast 
from the grain in process of cleaning. In this black dust there 
