818 
ANNUAL REPORT OF NEW YORK 
ANGOUMOIS MOTH. MOTH DESCRIBED. REMEDIES. 
and are laid upon the outer part ol the base of the fore wings, 
reaching less than half the length of the insect. 
The moth is about 0.30 long, to the tip of its abdomen, nnd 0.40 to tho end of its wings. 
Its width across the spread wings is 0.60 to 0.70. Tho head is smooth, being covered with 
short appressed scales, those surrounding the eyes being longer and radiating. The palpi aro 
long, ourving upward and backward over the head like horns, their tips reaching back to a 
line’with the neok. The basal joint is clothed on its under side with long bristle-like scales. 
The spiral tongue when uncoiled is about equal to the palpi in length. The antenme are 
about two-thirds tho length of the body and arc slightly tapering towards their tips. 
The general color of this moth is a uniform dull yellowish brown or brownish huff, tho huo 
olosely resembling that of coffee-and-milk; sometimes it is of a darker shade with only the 
head and body of this pale color. It has a satin-like gloss, which is stronger on tho under 
side, where tho color is paler than above. Tho palpi are black on their bases, forming a 
conspicuous spot of this color slightly below tho eye; and near their tips is a black band, 
which is broader on the inner or undor side. Tho apex of each joint of tho antenme is also 
black on the upper side, forming a slender transverse line half encircling those organs. Tho 
fore legs also are black, the exterior side of their thighs and hips being tawny white. The 
middle pair of feet nre also blackish above. Tho upper wings are freckled with black scales 
at the tip and along the middle part of the plait which runs from tho base of the wing 
obliquely to the inner margin, these latter scales often appearing like a short black stripe. 
Often there are also black scales sprinkled on tho disk and on tho inner margin towards its 
tip, and a small black streak on tho angle of tho inner margin near the base. Tho fringe of 
the upper wings is sometimes of a paler gray shade than tho ground, ornamented towards 
the base with a pale brown band in which some black atoms frequently appear; nt other 
times the wholo fringe is of the same brown color with- the lower wings. The under side of 
the upper wings and both surfaces of tho lower ones aro of a blackish gray or leaden color. 
A parasitic fly is mentioned by Reaumur, which sometimes 
hatches from the grains containing the larva or pupa ot the 
Angoumois moth. Twenty of these flies have been known to 
come from a single grain. 
Of the various attempts that have been made to prevent 01 
diminish the ravages of this moth, in Europe, it appears that 
the most effective method is to subject the infested grain to the 
heat of an oven or a very warm room. We do not know that it 
is ascertained exactly what degree of heat the grain can enduio 
without losing its germinating powers. It has been proved that 
it may be heated to about 11)0° of Fahrenheit’s scale without 
losing those powers. Rut it is not so much the intensity of the 
heat applied, as the length of its continuance, that kills the 
larvse and pup® in the grain. Thus, from 45° to 50 u Reaumm » 
scale, continued 24 or 36 hours, has more effect than 16° to 96° 
for one hour. 
The chief difficulty is, to maintain an equal temperature 
throughout the operation, and to meet this, in France, machines 
called Insect mills have been invented. One of the most simple 
of these, that of M. Marcellin Cadet de Yaux, is a large iron 
