In the first place, it may be noted that those persons who live temperately, rise early, and go to bed early; those who fulfil their duties toward God and man; those who have good digestion, and a good conscience――are never visited by any other blues than Order I., Class I. If any others ever do come to such persons, they usually depart as speedily as a rattlesnake from an ash stick. Of course, these people are not supposed to be particularly interested in our subject. But that numerous class, who are in the habit of neglecting some daily duty, or violating some moral or physical law; those who eat too much; those who take strong drinks; those who follow pleasure rather than peace; those, in short, who keep the mind like an ill-swept garret, decorated with dust, cobwebs and confusion――those persons are doubtless particularly interested in our subject. For these, the little blues of the pestiferous classes have a strong affinity. Around the hearts of these persons they are ever to be found. Upon their lifeblood these elves live. Of all classes of blues, the Rum Blue is, perhaps, the worst. Whether the insect called “_blue bottle_” took its name from it, or not, is a question for the learned. The class is pretty numerous, and includes a variety of genera, among which are the following. {GENUS 1. The gin blue. { {GENUS 2. The whiskey { blue. (In London called { “blue ruin.”) _Class II._ { _Rum Blues;_ {GENUS 3. The wine blue. _or,_ { _The Horrors._ {GENUS 4. The toddy blue. { {GENUS 5. The brandy { blue. { {GENUS 6. The Santa { Croix blue. This class of blues is particularly pestiferous. There is no great difference between them, and none but a nice observer can distinguish them: they are, however, a most destructive race. They often assemble in crowds around the mind, and are then called “_low spirits_,” or “the horrors,” terms which are descriptive of their character. They not unfrequently sting the soul and body with such agony, as to bring on what is called the _delirium tremens_――the most frightful of mortal maladies. Under the agony of the rum blue, a man will sometimes murder his wife and children. This subject is almost too frightful to dwell upon; but there is one source of consolation, and that is, that no one ever need be afflicted with the rum blue. If a person will only abstain from alcoholic liquors, he will never be infested with any species of this kind of vermin.