8 INSECTS AND INSECTICIDES. 
form of a two-wheeled cart, drawn by a horse, one of the 
wheels operating the pump. This apparatus does satisfactory 
work on level ground ; if the land is rough and the horse 
unsteady, one is very liable to have accidents in the breaking 
of minor parts of the gearing. The nozzle used was the 
“Boss” nozzle, which did satisfactory work. To spray potatoes 
and not injure the vines, a six-foot axle was used, that the 
wheels might cover three rows and the horse walk between 
two rows. This arrangement proved very satisfactory. The 
tank sent out by this firm is too large for one horse to draw 
with ease. I see no reason why this pump and two-wheeled 
cart should not prove an acquisition to potato growers on a 
large scale, on level ground. 
NOTES ON INSECTS. 
the currant measuring worm ( Eufitcliia ribearia). 
This caterpillar defoliated a large planting of the Hough¬ 
ton gooseberry, leaving untouched the Downing. The larvae 
appear early in May, are white, striped with yellow and dot¬ 
ted with black, and when full grown, late in June, measure 
nearly one and a half inches in length. This caterpillar 
moves by looping, or measuring, and dropping by a silken 
thread, when disturbed. In about two weeks the moths 
appear, which are of a yellowish, or cream color, with dusky 
spots or bands on the wings; these lay eggs on the twigs, 
where they remain until the following season. 
THE EUROPEAN CABBAGE CATERPILLAR (Pieris rapce). 
This insect was very common this season over a large por¬ 
tion of Colorado, hovering over the cabbages in vast num¬ 
bers. Our first specimens appeared early in March, and 
toward midsummer it was one of our most common species. 
This butterfly is white, spotted with black, resembling some¬ 
what the Southern cabbage butterfly, but the black spots are 
better defined and the ground color lighter. The larva is 
pale green, finely dotted with black. This butterfly is two- 
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