Pneumonic consolidation distributed with relation to the bronchi exhibits considerable variety, and an attempt to define a type of bronchopneumonia characteristic of influenza would be futile. Nevertheless, the bronchopneumonia of influenza has in many instances distinctive characters. Lesions of bronchopneumonia which are frequently found in the autopsies under consideration may be conveniently designated by descriptive terms, indicative of their location in the lung tissue. These lesions, of which two or more often occur in the same lung, are: 1. Peribronchiolar consolidation with which the inflammatory exudate is limited to the alveoli in the immediate neighborhood of the bronchioles. 2. Hemorrhagic peribronchiolar consolidation in which gray patches of peribronchiolar pneumonia occur upon a deep red background produced by hemorrhage into alveoli. Pfeiffer believed that this lesion was characteristic of influenza. 3. Lobular consolidation with which consolidation is limited to lobules or groups of lobules. 4. Peribronchial pneumonia with which small bronchi are encircled by pneumonic consolidation. Each one of these lesions will be discussed separately. Following is a list of the bacteria which have been isolated from the consolidated lung of individuals with bronchopneumonia unaccompanied by lobar pneumonia or by suppuration: B. influenzæ 1 Pneumococci 5 S. hemolyticus 5 S. viridans 1 B. influenzæ, pneumococci 9 B. influenzæ, S. hemolyticus 4 B. influenzæ, staphylococci 4 Pneumococci, S. hemolyticus 1 Pneumococci, staphylococci 2 S. hemolyticus, staphylococci 1 S. hemolyticus, B. coli 1 Staphylococci, S. viridans 1 Staphylococci, B. coli 1 B. influenzæ, pneumococci, staphylococci 1 B. influenzæ, pneumococci, S. viridans 1 B. influenzæ, S. hemolyticus, staphylococci 2 B. influenzæ, pneumococci, staphylococci, S. viridans 1 No microorganisms found 6 —— 47