The chrysalis state of the earlier broods lasts ten or twelve days, but the last brood does not come out till the following spring. Both wings of the butterfly are white,without spots, but dusky next to the body. The underside of the wings are sometimes quite variable, the tips of the fore wings being 'greenish or lemon-yellow, with the veins of that portion bordered with gray scales, and the hind wings covered all over with these two colors; or, they may be less intense though the gray scales along the veins in the hind wings are usually very distinct. The body is a little lighter than the preceding species, and the an tenna; are • tipped with light yellow instead of white. The expanse of the wings is about an inch and three-fourths. The ranges of this pest in. the West for the last few years, has been so extensive in the market gardens of our large cities as to render the successful raising of mar ketable cabbages almost impossible. Thus it is important that every means should be used to destroy the insects. 'Unfortunately, the fact that the head of the cabbage, the edible part, is di rectly preyed on, renders it dangerous to employ poisqnous compounds. In fact, scarcelyany
of the many remedies proposed have proVed effectual. Chloride of lime in solution, has been • reported to the editor of this work, by a success ful German gardener, as the best known means in his country. Solutions of salt and various other compounds seem to have very little effect. Mr. P. T. Quin, of New Jersey, was successful in saving 75,000 cabbages with a loss of only five per cent. by using the following: Twenty parts of superphosphate, one part carbolic pow der. and three parts air-slacked lime, all well mixed together and dusted freely over the plants and into the heads, at,, intervals of four days. The present season, 1880, we have noticed less than formerly of any of the species near Chicago, not enough to render anything but hand picking necessary. The probability is that persistent work heretoforer•and the, increase of parasitic insects, have caused the decline, a fact worthy the attention of all cabbage raisers. Assistance to the natural enemiss always pays, where the destruction of any noxious insect is concerned, a fact not generally known outside of those circles where science goes hand in hand with practice.