CATALOGUE OF NORTH AMERICAN DIPTERA. 7 1 



these ; where there seemed to be no valid reason for the alteration, I have 

 followed Say in nomenclature. In most cases of redescription, I omit the 

 locality, as it is the same as in Say's description. 



Achias, Dipterorum Genus a Fabricio conditum. Kiliit, 1830; 16 pp., i plate. 



Sphyracephala {Achias) brevicornis Say, redesc. and figured. 

 Monographia Generis Midarum. Nova Acta Academijie Naturse Curiosorum, 

 XV, 19-56, 3 col. plates; 1831. 

 Four new species from North America. 

 ^illiston, Samuel Wendell. 



An Anomalous Bombylid. Canadian Entomologist, Nov., 1879, 215. 



"Anthrax nov. sp., near fidiginosa." 

 Some Interesting New Diptera. Transactions of the Connecticut Academy of 

 Arts and Sciences, iv, 243-246, 1880. 



Rhynchocephalus sackenii, Sihius pollinosus, Chrysops discalis, new. 

 Eristalis tenax. Note on distribution, Canadian Entomologist, xiii, 76; Aug., 



1881. 

 New or Little Known Genera of North American Syrphids. Canadian Ento- 

 mologist, XIV, 77-82, 1882. 



Three new genera, five species ; superseded by his Synopsis of the 

 Syrphidse. 

 Drosophila ampelophila Loew. Canadian Entomologist, xiv, 138, 1882. 



Note on habits and distribution. 

 Contribution to a Monograph of North American Syrphidae. Proceedings of 

 the American Philosophical Society, xx, 299-332, 1882. 

 23 new species, all reproduced in the Synopsis. 

 On the North American Asilidee (Dasypogoninas, Laphrinje) with a New 

 Genus of Syrphidas. Transactions of the American Entom. Society, xi, 

 1-36, 3 Pl. ; 1883. 



20 new species of Asilidas; Nausigastcr punctulata n. g. and sp. of 

 Syrphidas. 

 The North American Species of Nemestrinidse. Canadian Entomologist, xv, 

 69-72, fig. ; 1883. 



Rhynchocephalus volaticiis n. sp., from Fla. ; table of species. 

 North American Conopidse. Transactions of the Conn. Academy: 

 I. Conops. Vol. IV, 325-342, I plate; 1883. 

 II. Stylogaster, Dalmannia, Oncomyia. Vol. vi, 87-94; 188+ 

 III. Conclusion. Vol. vi, 377-394, i plate; 1885. 



In these three numbers are tables of genera and species, old species re- 

 described, and several new ; practically a monograph of the family. 

 The Screw-worm Fly. Psyche, 1883, 132. 

 Notes on Chrysomyia macellaria Fab. 

 Fine Merkwiirdige neue Syrphiden-Gattung. Wiener Entom. Zeitung, iii, 

 185, 186, 1884. 

 Euccratomyia pergandei n. g. and sp., from D. C. 

 Note on the Genus Merapioidus Bigot. Wiener Entom. Zeitung, iii, 282, 



1884. 

 Dipterous Larvae from the Western Alkaline Lakes, and their Use as Food. 

 Transactions Conn. Academy, vi, 83-86; July, 1884. 

 Ephydra californica Pack., described, larva figured. 



