DIPTEROLOGÍA ARGEiNTlNA 279 



(20) 3. M. mellin-ura (Linnaeus) Schiner XXXÍI, 310 



IX. Mesograpla, Lów XXXII, 312 



(21) 1. M. tibicen (Wiedemann) F. Lynch Arribálzaga... XXXII, 313 



(22) 2. M. anchorata (Macqüart) Osten-Sacken XXXIII, 51 



(23) 3. M. duplicala (Wiedemann) F. Lynch Arribálzaga XXXIII, 52 



(24) 4. M. música (Wiedemann) F. Lynch Arribálzaga.. XXXIII, 53 



(25) 5. M. Willistonii, F. Lynch Arribálzaga XXXIII, 54 



(26) 6. M. ex-otica (Wiedemann) F. Lynch Arribálzaga. XXXIII, 56 



X. AUograpta, Osten-Sacken XXXIII, 56 



(27) 1 . A. obliqua (Say) Osten-Sacken XXXÍII, 57 



(28) 2. A. hortensis (Philippi) F. Lynch Arribálzaga. . . XXXIII, 58 



XI. Syrphus, Fabricius XXXIII, 111 



(29) 1 . S. Ribesii (Linneaus) Fabricius XXXIII, 113 



(30) 2. S. 8-macuIalus, Walker XXXIII, 114 



(31) 3. S. patagonus, F. Lynch Arribálzaga XXXIII, 115 



(32) 4. S. Macquarti, Blanchard XXXIII, 116 



(33) 5. S. bucephalus, Wiedemann XXXIII, 117 



(34) 6. S. Waikeri, F. Lynch Arribálzaga XXXIII, 117 



. XII. Catabomba, Osten-Sacken XXXIII, 118 



(35) 1. C. melanostoma (Macqüart) Van der Wulp XXXIII, 119 



(36) 2. C. Pyrastri (Linnaeus) Osten-Sacken XXXIII, 120 



Xilotini. XXXIII, 188 



XIIL Sterphus, Philippi XXXIII, 189 



(37)1. St. autumnalis, Philippi XXXIII, 191 



XIV. Stilbosoma, Philippi XXXIII, 191 



(38) 1 . St. nigrinervis, Philippi XXXIII, 193 



XV. Spilomyia, Meigen •. XXXIII, 193 



(39) 1. Sp. gratiosa, Van der Wulp XXXIII, 195 



Helopliilini XXXIII, 195. 



XVÍ. Plerellastes, Low XXXIII, i96 



(40) 1. Pt. nubeculosus. Van der Wulp XXXIII, 197 



XVII. Helophilus, Meigen XXXIII, 198 



(41) 1. H. chilensis, Walker XXXIU; 236 



XVIII. Tropidia, Meigen XXXIII, 238 



(42) I. T. insularis, F. Lynch Arribálzaga. i XXXIII, 238 



Erlstaiisii XXXIII, 240 



XIX. Promilesia, F. Lynch Arrib.álzaga XXXIÍL, 241 



(43) 1. P. neclarinoides, F. Lynch Arribálzaga XXXIII, 243 



XX. Priomerus, Macqüart ; XXXIII, 244 



(44) I. P. scutellaris (Fabricius) F. Lynch Arribálzaga. XXXIII, 245 



(45) 2. P. geniculalus (Bigot) F. Lynch. Arribálzaga . . XXXIII, 247 

 • XXI. Erislalis, Latreille XXXIII, 248 



- (46) 1 . E. bogotensis, Macqüart ; XXXIII, 253 



