16 CORN. 
hatch out in about from four to seven days, and proceed to bore into 
the grains, and feed on the material within them. In the case of 
Maize, it has been found that two or three or even more caterpillars 
may be found in one grain; but in the case of Wheat or Barley, or 
our other cereals, one maggot only is found in one grain kernel, and 
each kernel contains enough material to support its occupant until it 
is fully grown. Then, after gnawing a little round hole in the side of 
the grain as a way for escape when the change to moth condition has 
taken place, the caterpillar spins a web cocoon, which occupies a part 
of the inside of the emptied coat of the grain, the rest being occupied 
with its castings, or pellets of rejected matter, and in this web the cater- 
pillar goes through its change to the chrysalis state (see figure 6, p. 18). 
The moth (see figures 1 and 2, p. 18) is rather more than half an 
inch in spread of the fore wings; antenne long and fine, appearing a 
little beaded when magnified; proboscis long, and very noticeable ; 
the general colour of the whole insect, including in this all excepting 
the hinder wings (which are of a leaden grey), is of a light grey or 
somewhat ochrey tint, described by John Curtis as like ‘coffee and 
milk ”’; the specimens which I reared were of the yellowish tint. The 
fore wings, which are straight with a pointed apex, have some black 
markings (see figure), or some black atoms, sprinkled at the extremity, 
and also on the inner margin of the fringe, and the lower surface is of 
a rosy shining brown. The hinder wings are bordered with a long and 
delicate fringe. 
The length of the caterpillar is about two- to three-eighths of an 
inch ; the specimens which I measured after taking them from the 
North African Barley were only about a quarter of an inch long, and 
the grub thick-made for its length. The colour whitish, mouth parts 
of different shades of chestnut or of darker brown, and in the best 
living specimen two very fine lines of brown ran up the centre of the 
face from the lowest part. The pairs of claw-feet on the three fore- 
most segments were very small, and when seen through a two-inch 
focus-glass appeared almost like mere pale-coloured claws; and the 
four pairs of sucker-feet beneath the body (viewed with the same 
power) were only just perceptible.* 
* In the very interesting account given by Mr. OC. G. Barrett, F.E.S., of the 
infestation of this moth, Gelechia (Sitotroga) cerealella, Oliv., in connection with 
Maize imported from the United States, he mentions that ‘‘ the larva seems to be 
yellowish throughout. When full-grown, it is one-fourth of an inch in length, ex- 
cessively sluggish, with extremely small head partially withdrawn into the second 
segment; legs and prolegs minute and obscure; body thick, excessively wrinkled ; 
segments deeply divided. Head pale yellowish, with a brown spot on each lobe, and 
very small darker brown jaws. So stupidly inert as apparently to be fit only to lie 
in a cavity of the grain, and eat the starchy contents, packing away its excrement in 
white granules in the cavity behind it.”’—Ent, Mo. Mag. for January, 1897, p. 8. 
