G.  Rotheray, Zumbado, M., E. Hancock, G., and Thompson, F. C., ?Remarkable aquatic predators in the genus Ocyptamus (Diptera, Syrphidae)?, Studia dipterologica, vol. 7, pp. 385-398, 2000.

C.  Kassebeer, ?Zur Gattung Pseudodoros Becker, 1903 (Diptera, Syrpbidae)?, Dipteron, vol. 3, pp. 73-92, 2000.

S.  Yongshan and Yingdang, R., Diptera: Syrphidae. China Agricultural Scientech Press, 2000, p. 415 pp.

M. Angeles Marcos-Garc{\'?a and Pérez-Bañón, C., ?Eumerus etnensis van der Goot, 1964 (=Eumerus purpurariae Báez, 1982), syn. nov. (Diptera, Syrphidae)?, Nouvelle Revue Entomologique, vol. 17, p. 336, 2000.

C.  F. Thompson, ?A new Oriental Blera (Diptera: Syrphidae)?, Entomological News, vol. 111, pp. 181-184, 2000.

G.  Ståhls and Nyblom, K., ?Phylogenetic analysis of the genus Cheilosia (Diptera, Syrphidae) using mitochondrial CO1 sequence data?, Molecular Phylogenetics and Evolution, vol. 15, pp. 235-241, 2000.

J. - H.  Stuke, ?Phylogenetische rekonstruktion der verwandtschaftsbeziehungen innerhalb der gattung Cheilosia Meigen, 1822 anhand der larvenstadien (Diptera: Syrphidae). [Phylogenetic relationships within the genus Cheilosia Meigen, 1822, as evidenced by the larval stage?, Studia dipterologica, vol. Supplement 8, pp. 1-118, 2000.

C.  Kassebeer, ?Afroxanthandrus gen. nov. (Diptera, Syrphidae), eine neue Gattung der Syrphinae aus Westafrika?, Dipteron, vol. 3, pp. 149-158, 2000.

C.  Kassebeer, ?Revision der Gattung Pelloloma Vockeroth, 1973 (Diptera, Syrphidae), mit der Beschreibung neuer Arten aus Zenfralafrika?, Dipteron, vol. 3, pp. 159-166, 2000.

P.  Laska, Bicik, V. {\'?t{\ve}zslav, Dusek, J., Mazanek, L., and Holinka, J., ?Description of the puparia of Afrosyrphus varipes and Dideopsis aegrotus (Diptera, Syrphidae)?, Acta Universitatis Palackianae Olomucensis Facultas Rerum Naturalium - Biologica, vol. 38, pp. 79-83, 2000.

X. Y.  Cheng, Lu, J., Huang, C. M., Zhou, H. Z., Dai, Z. H., and Zhang, G. X., ?Determination of phylogenetic position of Pipizini (Diptera : Syrphidae): based on molecular biological and morphological data?, Science in China. Series C. Life Sciences, vol. 43, pp. 146-156, 2000.

C.  F. Thompson and Zumbado, M. A., ?Flower flies of the subgenus Ocyptamus (Mimocalla Hull) (Diptera: Syrphidae)?, Proceedings of the Entomological Society of Washington, vol. 102, pp. 773-793, 2000.

C.  F. Thompson, ?A new genus of Australasian flower flies (Diptera: Syrphidae)?, Studia dipterologica, vol. 7, pp. 373-384, 2000.

C.  F. Thompson, Thompson, B. J., and Fairman, J. E., ?Only in Costa Rica: new Neotropical flower flies (Diptera: Syrphidae)?, Studia Dipterologica, vol. 7, pp. 33-43, 2000.

J. H.  Skevington and Yeates, D. K., ?Phylogeny of the Syrphoidea (Diptera) inferred from mtDNA sequences and morphology with particular reference to classification of the Pipunculidae (Diptera)?, Molecular Phylogenetics and Evolution, vol. 16, pp. 212-224, 2000.