district                  vacator                                reason for change                       successor           date successor seated
0         oklahoma 7th     sam c massingale (d)                           died january 17 , 1941           victor wickersham (d)                  april 1 , 1941
1        new york 17th    kenneth f simpson (r)                           died january 25 , 1941            joseph c baldwin (r)                 march 11 , 1941
2          alabama 7th    walter w bankhead (d)                       resigned february 1 , 1941              carter manasco (d)                  june 24 , 1941
3         maryland 6th      william d byron (d)                          died february 27 , 1941             katharine byron (d)                   may 27 , 1941
4        new york 42nd       pius l schwert (d)                             died march 11 , 1941               john c butler (r)                 april 22 , 1941
5   north carolina 5th      alonzo d folger (d)                             died april 30 , 1941               john h folger (d)                  june 14 , 1941
6        new york 14th   morris m edelstein (d)                               died june 4 , 1941              arthur g klein (d)                  july 29 , 1941
7        wisconsin 1st       stephen bolles (r)                               died july 8 , 1941            lawrence h smith (r)                august 29 , 1941
8    pennsylvania 15th  albert g rutherford (r)                            died august 10 , 1941           wilson d gillette (r)               november 4 , 1941
9         colorado 4th      edward t taylor (d)                          died september 3 , 1941           robert f rockwell (r)               december 9 , 1941
10     california 17th          lee e geyer (d)                           died october 11 , 1941                cecil r king (d)                august 25 , 1942
11   massachusetts 7th   lawrence j connery (d)                           died october 19 , 1941               thomas j lane (d)              december 30 , 1941
12   pennsylvania 11th     patrick j boland (d)                               died may 18 , 1942           veronica g boland (d)               november 3 , 1942
13      california 3rd         frank h buck (d)                         died september 17 , 1942  vacant until the next congress  vacant until the next congress
14   pennsylvania 25th     charles i faddis (d)  resigned december 4 , 1942 to enter the us army  vacant until the next congress  vacant until the next congress
15        illinois 6th      a f maciejewski (d)                       resigned december 6 , 1942  vacant until the next congress  vacant until the next congress

Table as JSON:
{"district":{"0":"oklahoma 7th","1":"new york 17th","2":"alabama 7th","3":"maryland 6th","4":"new york 42nd","5":"north carolina 5th","6":"new york 14th","7":"wisconsin 1st","8":"pennsylvania 15th","9":"colorado 4th","10":"california 17th","11":"massachusetts 7th","12":"pennsylvania 11th","13":"california 3rd","14":"pennsylvania 25th","15":"illinois 6th"},"vacator":{"0":"sam c massingale (d)","1":"kenneth f simpson (r)","2":"walter w bankhead (d)","3":"william d byron (d)","4":"pius l schwert (d)","5":"alonzo d folger (d)","6":"morris m edelstein (d)","7":"stephen bolles (r)","8":"albert g rutherford (r)","9":"edward t taylor (d)","10":"lee e geyer (d)","11":"lawrence j connery (d)","12":"patrick j boland (d)","13":"frank h buck (d)","14":"charles i faddis (d)","15":"a f maciejewski (d)"},"reason for change":{"0":"died january 17 , 1941","1":"died january 25 , 1941","2":"resigned february 1 , 1941","3":"died february 27 , 1941","4":"died march 11 , 1941","5":"died april 30 , 1941","6":"died june 4 , 1941","7":"died july 8 , 1941","8":"died august 10 , 1941","9":"died september 3 , 1941","10":"died october 11 , 1941","11":"died october 19 , 1941","12":"died may 18 , 1942","13":"died september 17 , 1942","14":"resigned december 4 , 1942 to enter the us army","15":"resigned december 6 , 1942"},"successor":{"0":"victor wickersham (d)","1":"joseph c baldwin (r)","2":"carter manasco (d)","3":"katharine byron (d)","4":"john c butler (r)","5":"john h folger (d)","6":"arthur g klein (d)","7":"lawrence h smith (r)","8":"wilson d gillette (r)","9":"robert f rockwell (r)","10":"cecil r king (d)","11":"thomas j lane (d)","12":"veronica g boland (d)","13":"vacant until the next congress","14":"vacant until the next congress","15":"vacant until the next congress"},"date successor seated":{"0":"april 1 , 1941","1":"march 11 , 1941","2":"june 24 , 1941","3":"may 27 , 1941","4":"april 22 , 1941","5":"june 14 , 1941","6":"july 29 , 1941","7":"august 29 , 1941","8":"november 4 , 1941","9":"december 9 , 1941","10":"august 25 , 1942","11":"december 30 , 1941","12":"november 3 , 1942","13":"vacant until the next congress","14":"vacant until the next congress","15":"vacant until the next congress"}}