XLVI 



AUTHORITIES. 



WiEDEMAKN. C. R. W. — Aussereuropaisclie Zweifliigelige Insecten. 2 

 vols. Hamm 1828 -.30. With plates. 

 ., Diptera exotica. Kiliae 1821. 

 „ Analecta entomologica. Kiliae 1824. 

 „ Acliias, dipterorum genus a Fabricio conditum. Kiliae 1830. 



Spliyyaccphala (AcJiiaf<) brevicornis Say; described and figured. 

 „ INIonograpbia generis Midarum. (In the Nova acta Academiae 

 Naturae Ouriosoruui, vol XV. Bona 1831. 4to. With three 

 plates.) 

 Four new species from N. America. 

 Zetterstedt, J. W. — Insecta lapponica, descripta. 1 vol. in 4to. 

 Lipsiae 1838—40. 

 „ Diptera Scandinaviae disposita et descripta. 14 vols. Lundae 

 1842-1860. 



Both of these works contain many diptera common to Lapland 

 and the northern parts of the American continent. 



The Practical Entomologist, 



published by the Entomol. Soc. of Philadelphia. Vol I, 1865 — 66, 

 Vol. II, 1866 — 67. 



The American Entomologist, 



an illustrated Magazine of popular and practical Entomology, edited 

 by Benj. D. Walsh and Ch. V. Riley. St. Louis, Mo, Vol. I, 1868; 

 Vol. II (title changed to Amer. Entom. and Botanist) 1870. 



The Canadian Entomologist, 



Volume I — VII; 1869 — 1875. (Veil. I and II published in Toronto; 

 Voll. Ill — VII in London, Out.) 



The American Naturalist 



a monthly magazine of Natural History, published (until 1877) in 

 Salem, Mass. 



These periodicals have been quoted in the present volume for 

 the various notices and illustrations of N. -A. Diptera, which they 

 contain. 



