Another large grapevine caterpillar is the _Deilephila striata_, which is about the same size as the _Achæmon_. The moth has more pointed wings, with narrow stripes, and the larva is brighter colored, often yellowish green, with several colored stripes on the sides. The eggs are not laid on the vines, but on the weeds on the vacant lands outside the vineyard, especially on species of _Epilobium_, but also on other weeds, and they hatch and feed on them. The caterpillars feed in ordinary years only on the weeds on which they are bred, but in other years which are especially favorable to their enormous increase they migrate to the vineyards and feed on the vines at the most alarming rate. The caterpillars of both the above large moths vary in color from green to brown or violet brown, but as a rule the _Deilephila_ is more brightly colored than the _Achæmon_. The former is more active and often travels in enormous numbers, when it is called the army-worm. The _Achæmon_ is more blunt at both extremities, the head being almost truncate. [Illustration: Vineyard Scene, Rosedale Colony, Kern County, July, 1890.--Three Months After Planting.] Army-worms are smaller caterpillars, about one inch or more in length, which breed on the outside weeds, and which, when feed becomes scarce, migrate to the vineyards and feed on the vines. These caterpillars are the larvæ of smaller moths of various genera such as _Prodenia_ and others. Cutworms are other caterpillars of moths of the genus _Agrotis_, which feed on the branches of the vines, especially in the night-time, and in the daytime bury themselves in the soil beneath the vine. They are generally a gray or leathery color, while the army-worms are more violet and darker. _Damages._--The damages from these various caterpillars are sometimes very large. Some years they occur in enormous quantities, and hundreds of tons of them may then be picked from a vineyard of a hundred acres of vines. The leaves are eaten by them, and the grapes are either scalded by the sun or do not attain their sweetness and coloring. Sometimes these various caterpillars are very common and destructive for one or two years in succession, after which they disappear and do not return to trouble the vines again for many years. _Remedies._--The great caterpillars, after they have once infested the vineyard, can be destroyed by picking. A gang of men or boys should be furnished with buckets, which are besmeared on the inside with coal-oil. The caterpillars are picked and dropped in the buckets, from which they cannot crawl out, and when the buckets are half filled they may be emptied into trenches and covered up with soil. Many use small scissors, with which the caterpillars are cut in twain while sitting on the vines. This will do for wine grapes, which are grown higher above the ground, but will hardly be proper on the low Muscat vines, as the contents of the caterpillars are apt to soil the grapes.