In a foregoing section we have described instances of interstitial suppurative pneumonia unaccompanied by chronic changes, and in the present section we have described instances of unresolved bronchopneumonia with no infection by hemolytic streptococci. We have pointed out that the incidence of streptococcus infection with unresolved bronchopneumonia does not materially differ from that with acute bronchopneumonia even though the greater duration of the disease gives more opportunity for infection. In some of the autopsies made by MacCallum at Fort Sam Houston, lesions of streptococcus infection doubtless coexisted with unresolved bronchopneumonia. In the 3 autopsies described below, interstitial suppurative pneumonia with empyema caused by hemolytic streptococcus occurs in association with unresolved bronchopneumonia. =Autopsy 420.=—J. E. S., white, aged thirty-two years, born in England and resident of Los Angeles, Cal., had been in military service one month. Onset of illness began on October 3, eleven days before his death. He was admitted to the hospital on the following day with the diagnosis of influenza and acute bronchitis. Pneumonia believed to be lobar was recognized eight days after admission. =Anatomic Diagnosis.=—Unresolved bronchopneumonia with hemorrhagic peribronchiolar consolidation in right lung; interstitial suppurative pneumonia with consolidation in left upper lobe; fibrinopurulent pleurisy; purulent bronchitis. The left pleural cavity contains 200 c.c. of turbid yellow fluid in which are flakes of fibrin. In the inner and upper part of the left upper lobe there is an area of consolidation where the tissue has a cloudy, pinkish gray color and is finely granular on section. Here the interstitial septa are distended by edema, so that they are in places 0.5 c.c. across; in some spots they have a bright yellow color. In the posterior parts of the middle and lower lobes there is flabby consolidation where the tissue has a cloudy, red color with scattered ill-defined yellow spots. Bacteriologic examination shows the presence of hemolytic streptococci in the blood of the heart; hemolytic streptococci with B. influenzæ and S. aureus in the left lung and S. hemolyticus with S. aureus in the right lung.