[a][953] [Ibid.] Fig. 6. b´.
[954] [Ibid.] a. The Labella have been usually thought confined, or nearly so, to the genus Musca L.; but they may be traced in all genuine Diptera, i. e. excluding Hippobosca L.
[955] Plate [VII.] Fig. 5. a´, c´, d´.
[956] Plate [VII.] Fig. 5, 6. a´.
[958] [Ibid.] d´. It has not yet been satisfactorily ascertained, whether all the ordinary Trophi are represented in every Dipterous mouth, the number of the lancets seeming in some cases to vary.