Patent ID: 6896891

Claim:
A method for controlling a parasitic insect selected from fleas and lice on a human or animal, said method comprising contacting said parasitic insect with an effective amount therefor of a compound of the formula: wherein n represents 1 or 2; Subat. represents halogen; A and Z together with the nitrogen and carbon atom to which they are bonded form a saturated heterocyclic ring having 6 ring members, said hterocyclic ring containing in addition to the nitrogen atom to which A is bonded a further hetero group, said hetero group being selected from N—H and N-alkyl, wherein the alkyl of said N-alkyl has 1 to 4 carbon atoms; E represents NO 2 or CN; and X represents —CH═ or —N═; wherein said contacting of said parasitic insect with said compound is effected by: a) topically applying said compound to the dermis of said human or animal; or b) contacting the dermis of said human or animal with an article containing said compound, and wherein said contacting of said parasitic insect with said compound does not result in said compound being systemically distributed within said human or animal.