. Economic entomology for the farmer and fruit-grower. Beneficial insects. i6o AN ECONOMIC ENTOMOLOGY. necessary to go into details here. The agriculturist in the regions subject to chinch-bug attack should in each case inform himself of what results have been reached, and what recommendations are made by the Experiment Station in his own State. It need only be added that the character of the weather frequently deter- mines the increase of the insects, dry warm weather favoring, and wet cold weather being unfavorable to their development. In the family Coreidce we have species of moderate or l
. Economic entomology for the farmer and fruit-grower. Beneficial insects. i6o AN ECONOMIC ENTOMOLOGY. necessary to go into details here. The agriculturist in the regions subject to chinch-bug attack should in each case inform himself of what results have been reached, and what recommendations are made by the Experiment Station in his own State. It need only be added that the character of the weather frequently deter- mines the increase of the insects, dry warm weather favoring, and wet cold weather being unfavorable to their development. In the family Coreidce we have species of moderate or large size, many of them very curious in form and shape, some of them carnivorous, but others vegetarian and more or less injurious. They are oblong, rounded behind, the head rather small, with long antennae, and a beak of moderate length. They are flat- tened above, but very convex beneath, so that a section through the insect would show an appearance nearly resembling an equi- lateral triangle. The legs are usually of moderate length, but sometimes become curiously enlarged, the hind legs especially being subject to leaf-like expansion?, giving the insects a decidedly odd and bizarre appearance. They are brown in color, some- times black-marked, sometimes with reddish variegations, and altogether, perhaps, they resemble most nearly the Reduviidce, from which they are easily distinguished by the larger head and the longer, flattened, four-jointed beak. All the members of this family may be looked upon with suspicion, because, although a number of them do undoubtedly feed upon other insects, yet some of these very pre- daceous forms have also been observed feed- ing upon plants, and it is more than likely that they varj' their diet as occasion serves. A typical representative of the injurious forms is the well-known "squash-bug," Anasa tristis, which attacks cucurbit vines of all kinds and sometimes does notable injury. The insect is dull grayish-brown in color, the ti
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbenefic, bookyear1906
