A Revision of the Genera of the Syrphini (Diptera: Syrphidae). Mem. Ent. Soc. Canada, 1969, 62.

Vockeroth, J.R.

A Revision of the Genera of the Syrphini (Diptera: Syrphidae). Mem. Ent. Soc. Canada, 1969, 62. - 176 pp