The Oxford English Dictionary has many examples of "myself" used like this. I searched only for "and myself"  . Examples:

1904 W. B. Yeats Let. 16 Apr. (1994) III. 582 Miss Horniman, the architect & myself were inspecting the theatre

1960 Daily Tel. 27 Jan. 11/4 He subjected a colleague and myself to analyses

1987 Grimsby Evening Tel. 10 Dec. 24/6 The manager and myself are working flat out

The Oxford English Dictionary has many examples of "myself" used like this. I searched only for "and myself". Examples:

1904 W. B. Yeats Let. 16 Apr. (1994) III. 582
Miss Horniman, the architect & myself were inspecting the theatre

1960 Daily Tel. 27 Jan. 11/4
He subjected a colleague and myself to analyses

1987 Grimsby Evening Tel. 10 Dec. 24/6
The manager and myself are working flat out