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on the Bionomics of Southern Nigerian Insects. 379 
trumps just then, such as Argiolaus. But I was driven 
to concentrate on it to-night. Virtue had its own reward ! 
I have got two species of Lycaenids, one I think a Cato- 
chrysops, the other looks rather more like my Plerocarpus 
friends, but I’m not really sure. I don’t know it anyhow, 
and it’s a fairly useful-looking larva—not a tiny form. 
[ve got six and I'll get more now I know where to find them. 
Mr. Massee, who saw more in the field than ten average 
men, used to quote to me a saying of M. C. Cooke’s which 
was something like this: “If you can’t find a thing (that 
you have reason to think ought to be there) sit down till 
you do find it.” It isn’t bad advice, if one really has the 
luck to have good eyesight and something of a field instinct. 
Ive got the eyesight all right, but as for the field instinct— 
well I must touch wood. The more [I find the more I 
marvel how I missed the things so long. The little bush 
we have left here and the Harmattan together have reduced 
me to a “ field’ of 4 or 5 ant-trees. 
Feb. 5, 1918.—Canavalia is of the family Leguminosae. 
The species on which I find the Lycaenids is, I think, native, 
but it is one widely cultivated in the Old and New World 
tropics, and ours are actually grown from introduced seed. 
Yet a wild form (if it isn’t a distinct species) is common 
round here. 
There are without doubt two Lycaenids concerned, 
both boring into the pod—one a typically onisciform one 
which I think will prove to be “ malathana ;” but the other 
is very different—a plump, rather large larva that at first 
sight suggests a slightly pigmented Coleopterous larva or 
an Aegeriid. I was ata loss to recall what they did resemble 
more than Coleopterous larvae. Then I recalled the 
Aegeriids and had a spasm of doubt; but there zs a gland, 
though it doesn’t seem to function often, but the larvae 
are attended inside the borings by a tiny ant like a rather 
dark-coloured Monomorium. But the larva bores right 
inside the large bean: it is bigger or at least fatter than a 
broad bean, and the presence of larvae is indicated either 
by fresh frass round the opening or by a busy little crowd 
of ants running in and out. The little ant is always on 
the plants, larvae or no larvae, the inflorescence being very 
glandular. In addition a Jassid is present in small numbers. 
The larva is really quite Aegeriid-like, of a straw-colour 
generally, but with the anterior segment bright red, and 
rows of brownish purple spots along the sides. It 1s, 
