56 THE ENTOMOLOGIST. 
disclosed in both seasons use one kind of gall for the winter 
and another kind for the summer.—Francis Walker. 
© The Naturalist in Nicaragua:’ a Narrative of a Residence 
at the Gold-mines of Chontales, in the Savannahs, and 
Forests; with Observations on Animals and Plants in 
reference to the Theory of Evolution of Living Forms. 
By Tuomas Bett, F.G.S. London: John Murray, 1874. 
Post 8vo; 404 pp. letterpress, and 26 Illustrations on 
stone and wood. 
[At Brighton anglers bait for mackerel with a bit of tin: 
it glitters in the sun, and proves far more attractive to these 
silly fishes than substantial, wholesome, and natural food. 
Mr. Belt baits for Natural-History readers with “ evolution of 
of living forms.” He evidently aims to capture a shoal of 
naturalists, and considers this the most “kililng bait.” I 
think he under-rates us; I think he under-values our attain- 
ments and our intelligence: we are not, like the mackerel, to 
be caught by tin or tinsel; and this very announcement on 
the title-page had well-nigh induced me to close the book 
unread. Fortunately I did not, for ‘The Naturalist in 
Nicaragua’ is a capital book,—brimful of information, and 
worthy of attentive study by the most profound entomologist. 
I have no space in this journal for an extended review, but 
I will make some entomological extracts, which cannot fail 
both to instruct and delight my readers, and will recommend - 
the book far more than anything | can write.in its praise— 
Edward Newman.) 
Ecitons, or Foraging Anis.—“I saw many large armies of 
this, or a closely allied, species in the forest. My attention 
was generally first called to them by the twittering of some 
small birds, belonging to several different species, that follow 
the ants in the woods. On approaching, a dense body of the 
ants—three or four yards wide, and so numerous as to blacken 
the ground—would be seen moving rapidly in one direction, 
examining every cranny, and underneath every fallen leaf. 
On the flanks, and in advance of the main body, smaller 
columns would be pushed out; these smaller columns would 
generally first flush the cockroaches, grasshoppers, and spiders. 
