Published online by Cambridge University Press: 31 May 2012
Hitherto but a single genus(Conops) of this group has received general accepteance among dipterologists. A second genus, Physocephala, was based by Schiner on characters in themselves of but little importance, and which I did not deem sufficient to separate our species in the first paper I published* on the North American forms. A further study, however, convinced me that they were sufficiently constant to warrant their use, particularly in connection with other important ones in the neuration, which I pointed out.
* Trans. Conn. Acad., iv., 327.
† Ibid., vi., 388.
‡ Ann. Soc. Ent. Fr., 1887, 31.