The compounds are used as pesticides and agents to control parasites of animals and Agriculture, horticulture and Forestry. These parasites are, among other insects, nematodes, helminths and Molluscs.Claim 1: arilpirrolidinas formula (1) wherein R1 is C1 - 12 alkyl, cycloalkyl haloalquilo C1 - C3 - 8, 12, halocicloalquilo C3 - 8； R2 is oxo and / or tioxo and N is 1 or 2, where the dashed line in the formula (1) represents a Link, so R2 is connected through a Double Link The pyrrolidine ring and simple； and R2 is independently Halogen, Nitro, cyano, Hydroxy, mercapto,Amino alkyl haloalquilo C1 C1 - 12, - 12, - 12 haloalcoxi alkoxy C1, C1 (- 12, - 12 sulfenilo C1 alkyl (alkyl), C1 (12) sulfinilo, alkyl sulfonyl (C1 - 12), haloalquil C1 - sulfenilo (12), haloalquil C1 - sulfinilo haloalquil (12), 12) Sulfonyl - C1, C1 Sulphur PENTAFLUORIDE carbonyl alkoxy -, 12 -, haloalcoxi C1 - 1 2 - alkoxy carbonyl C1 -, 12 - or haloalcoxi carbonyloxy C1 - 12 - carbonyloxy, N is 1 or 2,If the broken line in the formula (1) represents nothing, so that R2 is connected through a single link to the pyrrolidine ring is C - or X3； nitrogen； x1, X2, X3 and X4 are each independently Hydrogen, halogen, Nitro, cyano, amino, Hydroxy, mercapto, alkyl C1 - 12 h Aloalquilo alkoxy C1 C1 - 12, - 12, - 12 (haloalcoxi C1, C1 - 12 alkyl (alkyl) sulfenilo, C1 sulfinilo, - 12)(C1 - alkyl sulfonyl (12), haloalquil C1 - sulfenilo (12), haloalquil C1 - sulfinilo (12), haloalquil C1 - 12) (C1 - 12 sulfonyl alkyl, amino, di (alkyl) - 12 (C1) amino, amino haloalquil C1 - 12), di (haloalquil C1 - 12) (C1 - amino alkyl (12) haloalquil c1-12) amino or Sulphur PENTAFLUORIDE； B1 is C - y1 or nitrogen； b 2 is C - Y2 and y3 nitrogen； B3 is C - or nitrogen； B4 is C - Y4 B3, or nitrogen.A link between B4 and B3 and B4 together represent Sulphur； y1, y2, y3 and Y4 each is independently Hydrogen, halogen, Nitro, cyano, amino, Hydroxy, mercapto, C1 - 12 alkyl, cycloalkyl haloalquilo C1 - C3 - 8, 12, halocicloalquilo alk
