THE NIGHTJAR AND THE SWALLOW. 45 
they can find an opportunity of laying their eggs, is a 
benefactor in no small degree, and is deserving of 
every protection and encouragement which we can 
possibly extend to it. 
The night-flying moths, also, are destroyed in great 
numbers by the nightjar, and as many of these, such 
as the Turnip and Cabbage moths and the common 
Yellow Underwing, are exceedingly injurious, the 
bird in killing them again benefits the farmer very 
considerably, and puts forward another claim upon 
his gratitude. 
By the working entomologist, however, the night- 
jar is less appreciated, owing to the manner in which 
it rapidly acquires both a knowledge of his proceed- 
ings, and the art of obtaining therefrom a consider- 
able personal advantage. 
In this wise. 
The collector, with a view to capturing the greatest 
possible number of moths at the least possible 
expense of time and trouble, prepares an alluring 
mixture of treacle and rum, with which he paints the 
trunks of trees as the shades of evening are falling. 
Half an hour later he lights a bull’s-eye lantern, arms 
himself with a number of chip pill-boxes of various 
sizes, and commences the round of his baits. Every 
tree yields him numbers of specimens, which with 
extended trunks are rapidly absorbing the enticing 
mixture, and passing into a state of semi-intoxication 
which renders them careless of danger and oblivious 
of all but their repast.  Pill-box after pill-box im- 
prisons its captive, round after round of the trees is 
