DEL DOTT. E. GIGLIO-TOS 



379 



Melanostoma ? quadrinotatum Bigot, Ann. Soc. Ent. Fr., 1884, p. 77. 



— ? annuliferum Bigot, ibid., p. 84. 



— cyaneocinctum Bigot, ibid., 1885, p. 251. 



— rugonasus Williston, Biol. Centr. Amor., IH, p. 13, 8. 

 Syrphus delineatus Macquart, Dipt. exot., l or suppl., p. 139. 



— colludens, Trans. Ent. Soc. Lond., n. ser., V, p. 293. 



— agili* Bigot, Ann. Soc. Ent. Fr., 1884, p. 92. 



— americanus Wiedemann, loc. cit., II, p. 129; Williston, loc. cit., p. 15, 1. 



— lotus Williston, ibid., p. 16, 2. 



— diversus Williston, ibid., p. 16, 5. 



— gastrostactus ? Williston, ibid., p. 17, 8. 



— decipiens Williston, ibid., p. 18, 9. 



Didea laxa Osten Sacken, Bull. Buff. Soc, III, p. 66; Williston, loc. cit., p. 18, 1. 

 Sphaerophoria rostrata Bigot, Ann. Soc. Ent. Fr., 1884, p. 102. 



— pachypyga Bigot, ibid., p. 104. 



— fulvicauda Bigot, ibid., p. 104. 



— — ? Williston, loc. cit., p. 22, 3. 



— — ? Williston, ibid., p. 22, 4. 



— nasuta Bigot, ibid., 1888, p. 253. 



— trilimbata Bigot, ibid., 1888, p. 253. 



Mesogramma ectypum Say, Journ. Acad. Philad., VI, p. 165 (Syrphus). 



— lineare van der Wulp, Tijdschr. v. Entom., XVI, p. 5 (Mesograpta). 



— (?) saphiridiceps Bigot, ibid., 1884, p. 105 (Mesograpta). 



— ma Bigot, ibid., p. 105 (Mesograpta). 



— lacrymosum Bigot, ibid., p. 108 (Mesograpta). 



— heraldicum Bigot, ibid., p. 109 (Mesograpta). 



— trilobatum Bigot, ibid., p. 109 (Mesograpta). 



— bistrigum Bigot, ibid., p. 110 (Mesograpta). 



— maculatimi Bigot, ibid., p. Ili (Mesograpta). 



— bicinctum Bigot, ibid., p. 112 (Mesograpta). 



— quinquecinctum Bigot, ibid., 1888, p. 254 (Mesograpta). 



— quinquemaculatum Bigot, ibid., 1888, p. 254 (Mesograpta). 



— ? Williston, Biol. Centr. Amer., HI, p. 25, 4. 



— ? Williston, ibid., p. 26, 5. 



— ? Williston, ibid., p. 26, 6. 



— ? Williston, ibid., p. 27, 8. 



Salpingogaster limbipennis Williston, ibid., p. 29, 3. 

 Ocyptamus infuscatus Bigot, ibid., 1883, p. 324. 



— fraternus Bigot, ibid., p. 324. 

 Baccha luctuosa Bigot, ibid., p. 334. 



— conjuncta Wiedemann, Auss. zweif. Ins., II, p. 116 (Syrphus); Williston, loc. cit., 



p. 33, 1. 



— lineata Macquart, Dipt. ex., I er suppl., p. 139. 



— phaeoptera Schiner, Reise Novara, p. 342; Williston, loc. cit., p. 33, 2. 



— livida Schiner, ibid., p. 343; Williston, ibid., p. 33, 3. 



