164 



DITTERI DEL MESSICO 



40. Schiner J. R., Beise der Fregatte Novara, Zool. Theil., Band LI, Diptera, 1868. 



41. Walker Fr., List of the specimens of Dipterous Insects in the collection of British 

 Museuin, London, 1854. 



42. Id. Insecta Saundersiana: or characters of undescribed Insects in the collection of 



M'iìl iti ni Wilson Saunders, Esq., voi. I, Diptera, London, 1856. 



43. Id. Characters of tindescribed Diptera in the collection of. W. W. Saunders Esq. F. 

 B. S. ecc., in " Transactions entomological Society „, voi. V, N. S., part. VII, 1857, 



44. Wiedemann W., Aussereuropaeische ziveifliigeligen Insekten. Hamra, 1828-1830. 



45. Williston S. W., Synopsis of the North American Syrphidae, in * Bulletin of the 

 United States National Museum „, n° 31, Washington, 1886. 



46. Id. Diptera Brasiliana ab H. H. Smith collecta, in ■ Transactions of the American 

 entomological Society, Philadelphia, XV, 1888, pp. 243-291. 



47. Wulp (van der) F. M., Amerikaansche Diptera, n° 1, in " Tijdschrift voor Ento- 

 mologie „ XXIV, 1881, pp. 141-168. 



48. Id. Amerikaansche Diptera, n° 2, in " Tijdschrift voor Entomologie „, XXV, 1882, 

 pp. 77-136. 



