338 THE PEOPLE'S FARM AND STOCK CYCLOPEDIA. 



resembling very much our old speckled white cabbage butterfly 

 (Pieris protodice, Boisd.), though, as will be seen by the figures 

 (Fig. 17, male, Fig. 18, female), the spots are better defined, 

 while usually there is less black. 



This larva (Fig. 19, a) is pale green, finely dotted with 

 black, and when mature, one and one-half inches in length, 

 while the larva of our old spotted 

 butterfly is blue, striped with yellow. 

 The chrysalis (Fig. 19, #), which 

 fastens under a board or clod, at- 

 taches at one end, and fastens a 

 silken band around near the other ex- 

 tremity. It is brown, while the old FIG. is. 

 one is gray. I am thus particular in this description, as it is 

 imperative, that we may know the enemy at the first onset, so 

 as to give quick battle. 



NATURAL HISTORY. These butterflies, like both species of our 

 common white ones, are two-brooded. The first butterflies ap- 

 pear early in spring, in April or May. After pair- 

 ing, the eggs are deposited on the under side of 

 the cabbage leaves. These hatch, and the larvae 

 feed on the leaves, assume the chrysalis state, 

 and the imagoes come forth again in June or July. 

 The second brood behave similarly, except that 

 they remain as pupa or chrysalids through the 

 winter. 



REMEDIES. As pyrethrum is so fatal to these- 

 pests and so entirely non-poisonous to higher 

 animals, it alone is all the remedy needed. Mixed one to 

 twenty with flour, or one tablespoonful to two gallons of 

 water the first to be blown on by use of a hand bellows, 

 the latter forced on by use of a fountain pump I have 

 found it quick death to these pests of the cabbage grower. 

 This pyrethrum, which is the powdered flowers of a com- 

 dosite plant, Pyrethrum cineraricefolium, is now extensively 

 grown in California, and sold at reasonable prices. We find 

 it admirable to kill house flies. We darken the rest of the 



