68 DITTERI DEL MESSICO 



40. ScHiNEK J. R., Beise der Fregatte Novara, Zool. Theil., Band II, Diptera, 1868. 



41. Walkek Fr., List of the speclmens of Dipferous Lisects in the coUection of British 



Museum, London, 1854. 



42. Id. Inseda Saundersiana : or characters of undescribed Insects in the coUection of 



William Wilson Saunders, Esq., voi. I, Diptera, London, 1856. 



43. Id. Characters of undescribed Diptera in the coUection of. W. W. Saunders Esq. F. 



E. S. ecc., in " Transactious entomologica! Society „, voi. V, N. S., part. VE, 1857. 



44. WiEDEMANN W., AusscreurojKieische zweiflilgeligen Insekten. Hamni, 1828-1830. 



45. WiLLisTON S. W., Synopsis of the North American Syrphidae, in " BuUetin of the 



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



46. Id. Dìptera Brasiliana ab H. H. Smith collecta, in " Transactions of the American 



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



47. WuLP (vAN dee) 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, 188% 



pp. 77-136. 



