INSANITIES OCCURRING AT EVOLUTIONAL PERIODS OF LIFE. - Insanity of pubescence and adolescence is manifested by various trains of symptoms. Acute mania is on the whole the most common : it is characterized by motor restlessness ; the patient walks, talks, smokes, drinks, must ever be on the move. Where self-abuse comes in as a factor, the sufferer is melancholic and suspicious, self-accusing. Dipsomania is a not unfrequent symptom. But whatever may be the general symptoms of these three sets of patients, they have one common symptom, a perversion or increase of the sexual instinct. Prognosis is favourable as regards the attack present, unfavourable as to the probability of recurrence. Climacteric insanity, which is nearly as common in men as in women, is marked by pretty constant symptoms of a melancholic character. Prognosis generally favourable. Senile insanity is symptomatized by dementia with frequent intercurrent attacks of mania. Prognosis unfavourable. The most frequent symptoms of the insanity of pregnancy are melancholy and moral perversion, the latter taking the form of dipsomania. Puerperal insanity shows itself during the first seventeen days after labour, and is of sudden incidence ; the mental symptom is acute delirious mania. Prognosis is favourable in this, as in the insanity of pregnancy. (Vide J. Batty Tuke, "On Puerperal Insanity," Edin. Med. Journ., May 1865 and June 1867.)