Category: Science - Biology
Insects are divided by naturalists into several principal orders, the distinguishing marks of which are generally very well defined--for example, the butterflies and moths belong to the order _Lepidoptera_, the dragon-flies to the _Neuroptera_, the common house-flies to the _D...
Females in all stages apterous; metamorphosis semi-complete; naked or covered; active or stationary; rostrum usually present in all stages, sometimes absent in adult; feet somet...
5. CHAPTER V.Many people are under the impression that scale-insects out-of-doors are not of much consequence. They are aware that in greenhouses and hothouses these insects are a trouble to...
2. CHAPTER II.The first principal character separating the Coccididæ from the rest of the Homoptera, and distinguishable without microscopic examination, is the absence of wings in the female...
3. CHAPTER III.The Coccididæ, in some parts of the world, excrete various substances which are of commercial value, as, for example, shellac, "manna," candle-wax, &c. Cochineal is not in the s...
4. CHAPTER IV.The Coccididæ, like all Homoptera, produce great numbers of young; but their increase does not appear to be as rapid as that of some other families. The numbers of some Aphididæ...
1. CHAPTER I.Insects are divided by naturalists into several principal orders, the distinguishing marks of which are generally very well defined--for example, the butterflies and moths belon...